diff --git a/swad_centre.c b/swad_centre.c
index 6d06cbd8..a26ab77d 100644
--- a/swad_centre.c
+++ b/swad_centre.c
@@ -1674,13 +1674,13 @@ static void Ctr_PutParamOtherCtrCod (long CtrCod)
 /****************** Get parameter with code of other centre ******************/
 /*****************************************************************************/
 
-long Ctr_GetAndCheckParamOtherCtrCod (void)
+long Ctr_GetAndCheckParamOtherCtrCod (long MinCodAllowed)
   {
    long CtrCod;
 
    /***** Get and check parameter with code of centre *****/
-   if ((CtrCod = Par_GetParToLong ("OthCtrCod")) <= 0)
-      Lay_ShowErrorAndExit ("Code of centre is missing.");
+   if ((CtrCod = Par_GetParToLong ("OthCtrCod")) < MinCodAllowed)
+      Lay_ShowErrorAndExit ("Code of centre is missing or invalid.");
 
    return CtrCod;
   }
@@ -1698,7 +1698,7 @@ void Ctr_RemoveCentre (void)
    char PathCtr[PATH_MAX + 1];
 
    /***** Get centre code *****/
-   Ctr.CtrCod = Ctr_GetAndCheckParamOtherCtrCod ();
+   Ctr.CtrCod = Ctr_GetAndCheckParamOtherCtrCod (1);
 
    /***** Get data of the centre from database *****/
    Ctr_GetDataOfCentreByCod (&Ctr);
@@ -1728,12 +1728,12 @@ void Ctr_RemoveCentre (void)
 
       /***** Remove centre *****/
       sprintf (Query,"DELETE FROM centres WHERE CtrCod=%ld",
-               Ctr.CtrCod);
+	       Ctr.CtrCod);
       DB_QueryDELETE (Query,"can not remove a centre");
 
       /***** Write message to show the change made *****/
       sprintf (Gbl.Alert.Txt,Txt_Centre_X_removed,
-               Ctr.FullName);
+	       Ctr.FullName);
       Ale_ShowAlert (Ale_SUCCESS,Gbl.Alert.Txt);
      }
 
@@ -1752,7 +1752,7 @@ void Ctr_ChangeCtrInsInConfig (void)
    struct Instit NewIns;
 
    /***** Get parameter with institution code *****/
-   NewIns.InsCod = Ins_GetAndCheckParamOtherInsCod ();
+   NewIns.InsCod = Ins_GetAndCheckParamOtherInsCod (1);
 
    /***** Check if institution has changed *****/
    if (NewIns.InsCod != Gbl.CurrentCtr.Ctr.InsCod)
@@ -1834,11 +1834,10 @@ void Ctr_ChangeCentrePlace (void)
    long NewPlcCod;
    char Query[512];
 
-   /***** Get parameters from form *****/
-   /* Get centre code */
-   Gbl.Ctrs.EditingCtr.CtrCod = Ctr_GetAndCheckParamOtherCtrCod ();
+   /***** Get centre code *****/
+   Gbl.Ctrs.EditingCtr.CtrCod = Ctr_GetAndCheckParamOtherCtrCod (1);
 
-   /* Get parameter with centre code */
+   /***** Get parameter with place code *****/
    NewPlcCod = Plc_GetParamPlcCod ();
 
    /***** Get data of centre from database *****/
@@ -1846,12 +1845,12 @@ void Ctr_ChangeCentrePlace (void)
 
    /***** Update place in table of centres *****/
    sprintf (Query,"UPDATE centres SET PlcCod=%ld WHERE CtrCod=%ld",
-            NewPlcCod,Gbl.Ctrs.EditingCtr.CtrCod);
+	    NewPlcCod,Gbl.Ctrs.EditingCtr.CtrCod);
    DB_QueryUPDATE (Query,"can not update the place of a centre");
    Gbl.Ctrs.EditingCtr.PlcCod = NewPlcCod;
 
    /***** Write message to show the change made
-          and put button to go to centre changed *****/
+	  and put button to go to centre changed *****/
    Gbl.Alert.Type = Ale_SUCCESS;
    sprintf (Gbl.Alert.Txt,"%s",Txt_The_place_of_the_centre_has_changed);
    Ctr_ShowAlertAndButtonToGoToCtr ();
@@ -1866,7 +1865,7 @@ void Ctr_ChangeCentrePlace (void)
 
 void Ctr_RenameCentreShort (void)
   {
-   Gbl.Ctrs.EditingCtr.CtrCod = Ctr_GetAndCheckParamOtherCtrCod ();
+   Gbl.Ctrs.EditingCtr.CtrCod = Ctr_GetAndCheckParamOtherCtrCod (1);
    Ctr_RenameCentre (&Gbl.Ctrs.EditingCtr,Cns_SHRT_NAME);
   }
 
@@ -1881,7 +1880,7 @@ void Ctr_RenameCentreShortInConfig (void)
 
 void Ctr_RenameCentreFull (void)
   {
-   Gbl.Ctrs.EditingCtr.CtrCod = Ctr_GetAndCheckParamOtherCtrCod ();
+   Gbl.Ctrs.EditingCtr.CtrCod = Ctr_GetAndCheckParamOtherCtrCod (1);
    Ctr_RenameCentre (&Gbl.Ctrs.EditingCtr,Cns_FULL_NAME);
   }
 
@@ -2010,11 +2009,10 @@ void Ctr_ChangeCtrWWW (void)
    extern const char *Txt_You_can_not_leave_the_web_address_empty;
    char NewWWW[Cns_MAX_BYTES_WWW + 1];
 
-   /***** Get parameters from form *****/
-   /* Get the code of the centre */
-   Gbl.Ctrs.EditingCtr.CtrCod = Ctr_GetAndCheckParamOtherCtrCod ();
+   /***** Get the code of the centre *****/
+   Gbl.Ctrs.EditingCtr.CtrCod = Ctr_GetAndCheckParamOtherCtrCod (1);
 
-   /* Get the new WWW for the centre */
+   /***** Get the new WWW for the centre *****/
    Par_GetParToText ("WWW",NewWWW,Cns_MAX_BYTES_WWW);
 
    /***** Get data of centre *****/
@@ -2026,7 +2024,7 @@ void Ctr_ChangeCtrWWW (void)
       /***** Update database changing old WWW by new WWW *****/
       Ctr_UpdateCtrWWWDB (Gbl.Ctrs.EditingCtr.CtrCod,NewWWW);
       Str_Copy (Gbl.Ctrs.EditingCtr.WWW,NewWWW,
-                Cns_MAX_BYTES_WWW);
+		Cns_MAX_BYTES_WWW);
 
       /***** Write message to show the change made
 	     and put button to go to centre changed *****/
@@ -2096,16 +2094,15 @@ void Ctr_ChangeCtrStatus (void)
    Ctr_Status_t Status;
    Ctr_StatusTxt_t StatusTxt;
 
-   /***** Get parameters from form *****/
-   /* Get centre code */
-   Gbl.Ctrs.EditingCtr.CtrCod = Ctr_GetAndCheckParamOtherCtrCod ();
+   /***** Get centre code *****/
+   Gbl.Ctrs.EditingCtr.CtrCod = Ctr_GetAndCheckParamOtherCtrCod (1);
 
-   /* Get parameter with status */
+   /***** Get parameter with status *****/
    Status = (Ctr_Status_t)
 	    Par_GetParToUnsignedLong ("Status",
-	                              0,
-	                              (unsigned long) Ctr_MAX_STATUS,
-                                      (unsigned long) Ctr_WRONG_STATUS);
+				      0,
+				      (unsigned long) Ctr_MAX_STATUS,
+				      (unsigned long) Ctr_WRONG_STATUS);
    if (Status == Ctr_WRONG_STATUS)
       Lay_ShowErrorAndExit ("Wrong status.");
    StatusTxt = Ctr_GetStatusTxtFromStatusBits (Status);
@@ -2116,7 +2113,7 @@ void Ctr_ChangeCtrStatus (void)
 
    /***** Update status in table of centres *****/
    sprintf (Query,"UPDATE centres SET Status=%u WHERE CtrCod=%ld",
-            (unsigned) Status,Gbl.Ctrs.EditingCtr.CtrCod);
+	    (unsigned) Status,Gbl.Ctrs.EditingCtr.CtrCod);
    DB_QueryUPDATE (Query,"can not update the status of a centre");
    Gbl.Ctrs.EditingCtr.Status = Status;
 
@@ -2124,7 +2121,7 @@ void Ctr_ChangeCtrStatus (void)
 	  and put button to go to centre changed *****/
    Gbl.Alert.Type = Ale_SUCCESS;
    sprintf (Gbl.Alert.Txt,Txt_The_status_of_the_centre_X_has_changed,
-            Gbl.Ctrs.EditingCtr.ShrtName);
+	    Gbl.Ctrs.EditingCtr.ShrtName);
    Ctr_ShowAlertAndButtonToGoToCtr ();
 
    /***** Show the form again *****/
diff --git a/swad_centre.h b/swad_centre.h
index 57a7fed7..28e4751c 100644
--- a/swad_centre.h
+++ b/swad_centre.h
@@ -102,7 +102,7 @@ void Ctr_GetShortNameOfCentreByCod (struct Centre *Ctr);
 void Ctr_FreeListCentres (void);
 void Ctr_WriteSelectorOfCentre (void);
 void Ctr_PutParamCtrCod (long CtrCod);
-long Ctr_GetAndCheckParamOtherCtrCod (void);
+long Ctr_GetAndCheckParamOtherCtrCod (long MinCodAllowed);
 void Ctr_RemoveCentre (void);
 void Ctr_ChangeCtrInsInConfig (void);
 void Ctr_ContEditAfterChgCtrInConfig (void);
diff --git a/swad_changelog.h b/swad_changelog.h
index 2d25534c..7ac0b815 100644
--- a/swad_changelog.h
+++ b/swad_changelog.h
@@ -227,17 +227,20 @@
 
 // TODO: Fix bug: An URL like https://openswad.org/es?a gives Internal Server Error
 
+// TODO: Limit lenght of very big institution name in record card
+
 /*****************************************************************************/
 /****************************** Public constants *****************************/
 /*****************************************************************************/
 
-#define Log_PLATFORM_VERSION	"SWAD 16.231.4 (2017-05-31)"
+#define Log_PLATFORM_VERSION	"SWAD 16.232 (2017-05-31)"
 #define CSS_FILE		"swad16.226.css"
 #define JS_FILE			"swad16.206.3.js"
 
 // Number of lines (includes comments but not blank lines) has been got with the following command:
 // nl swad*.c swad*.h css/swad*.css py/swad*.py js/swad*.js soap/swad*?.h sql/swad*.sql | tail -1
 /*
+        Version 16.232:   May 31, 2017	Fix bug in selection of user's centre. (221042 lines)
         Version 16.231.4: May 31, 2017	Changes in layout of statistics about institutions.
 					Fixed bug in search. (221039 lines)
         Version 16.231.3: May 31, 2017	Changes in layout of statistics about institutions. (221037 lines)
diff --git a/swad_country.c b/swad_country.c
index 47805c1c..89b8404c 100644
--- a/swad_country.c
+++ b/swad_country.c
@@ -1647,13 +1647,13 @@ static void Cty_PutParamOtherCtyCod (long CtyCod)
 /******************* Get parameter with code of country **********************/
 /*****************************************************************************/
 
-long Cty_GetAndCheckParamOtherCtyCod (void)
+long Cty_GetAndCheckParamOtherCtyCod (long MinCodAllowed)
   {
    long CtyCod;
 
    /***** Get and check parameter with code of country *****/
-   if ((CtyCod = Cty_GetParamOtherCtyCod ()) < 0)
-      Lay_ShowErrorAndExit ("Code of country is missing.");
+   if ((CtyCod = Cty_GetParamOtherCtyCod ()) < MinCodAllowed)
+      Lay_ShowErrorAndExit ("Code of country is missing or invalid.");
 
    return CtyCod;
   }
@@ -1676,7 +1676,7 @@ void Cty_RemoveCountry (void)
    struct Country Cty;
 
    /***** Get country code *****/
-   Cty.CtyCod = Cty_GetAndCheckParamOtherCtyCod ();
+   Cty.CtyCod = Cty_GetAndCheckParamOtherCtyCod (0);
 
    /***** Get data of the country from database *****/
    Cty_GetDataOfCountryByCod (&Cty,Cty_GET_EXTRA_DATA);
@@ -1693,12 +1693,12 @@ void Cty_RemoveCountry (void)
 
       /***** Remove country *****/
       sprintf (Query,"DELETE FROM countries WHERE CtyCod='%03ld'",
-               Cty.CtyCod);
+	       Cty.CtyCod);
       DB_QueryDELETE (Query,"can not remove a country");
 
       /***** Write message to show the change made *****/
       sprintf (Gbl.Alert.Txt,Txt_Country_X_removed,
-               Cty.Name[Gbl.Prefs.Language]);
+	       Cty.Name[Gbl.Prefs.Language]);
       Ale_ShowAlert (Ale_SUCCESS,Gbl.Alert.Txt);
      }
 
@@ -1724,14 +1724,13 @@ void Cty_RenameCountry (void)
 
    Cty = &Gbl.Ctys.EditingCty;
 
-   /***** Get parameters from form *****/
-   /* Get the code of the country */
-   Cty->CtyCod = Cty_GetAndCheckParamOtherCtyCod ();
+   /***** Get the code of the country *****/
+   Cty->CtyCod = Cty_GetAndCheckParamOtherCtyCod (0);
 
-   /* Get the lenguage */
+   /***** Get the lenguage *****/
    Language = Lan_GetParamLanguage ();
 
-   /* Get the new name for the country */
+   /***** Get the new name for the country *****/
    Par_GetParToText ("Name",NewCtyName,Cty_MAX_BYTES_NAME);
 
    /***** Get from the database the data of the country *****/
@@ -1741,44 +1740,46 @@ void Cty_RenameCountry (void)
    if (!NewCtyName[0])
      {
       sprintf (Gbl.Alert.Txt,Txt_You_can_not_leave_the_name_of_the_country_X_empty,
-               Cty->Name[Language]);
+	       Cty->Name[Language]);
       Ale_ShowAlert (Ale_WARNING,Gbl.Alert.Txt);
      }
    else
      {
       /***** Check if old and new names are the same (this happens when user press enter with no changes in the form) *****/
       if (strcmp (Cty->Name[Language],NewCtyName))	// Different names
-        {
-         /***** If country was in database... *****/
-         if (Cty_CheckIfCountryNameExists (Language,NewCtyName,Cty->CtyCod))
-           {
-            sprintf (Gbl.Alert.Txt,Txt_The_country_X_already_exists,
-                     NewCtyName);
-            Ale_ShowAlert (Ale_WARNING,Gbl.Alert.Txt);
-           }
-         else
-           {
-            /* Update the table changing old name by new name */
-            sprintf (FieldName,"Name_%s",Txt_STR_LANG_ID[Language]);
-            Cty_UpdateCtyNameDB (Cty->CtyCod,FieldName,NewCtyName);
+	{
+	 /***** If country was in database... *****/
+	 if (Cty_CheckIfCountryNameExists (Language,NewCtyName,Cty->CtyCod))
+	   {
+	    sprintf (Gbl.Alert.Txt,Txt_The_country_X_already_exists,
+		     NewCtyName);
+	    Ale_ShowAlert (Ale_WARNING,Gbl.Alert.Txt);
+	   }
+	 else
+	   {
+	    /* Update the table changing old name by new name */
+	    sprintf (FieldName,"Name_%s",Txt_STR_LANG_ID[Language]);
+	    Cty_UpdateCtyNameDB (Cty->CtyCod,FieldName,NewCtyName);
 
-            /* Write message to show the change made */
-            sprintf (Gbl.Alert.Txt,Txt_The_country_X_has_been_renamed_as_Y,
-                     Cty->Name[Language],NewCtyName);
-            Ale_ShowAlert (Ale_SUCCESS,Gbl.Alert.Txt);
-           }
-        }
+	    /* Write message to show the change made */
+	    sprintf (Gbl.Alert.Txt,Txt_The_country_X_has_been_renamed_as_Y,
+		     Cty->Name[Language],NewCtyName);
+	    Ale_ShowAlert (Ale_SUCCESS,Gbl.Alert.Txt);
+
+	    /* Update country name */
+	    Str_Copy (Cty->Name[Language],NewCtyName,
+		      Cty_MAX_BYTES_NAME);
+	   }
+	}
       else	// The same name
-        {
-         sprintf (Gbl.Alert.Txt,Txt_The_name_of_the_country_X_has_not_changed,
-                  Cty->Name[Language]);
-         Ale_ShowAlert (Ale_INFO,Gbl.Alert.Txt);
-        }
+	{
+	 sprintf (Gbl.Alert.Txt,Txt_The_name_of_the_country_X_has_not_changed,
+		  Cty->Name[Language]);
+	 Ale_ShowAlert (Ale_INFO,Gbl.Alert.Txt);
+	}
      }
 
    /***** Show the form again *****/
-   Str_Copy (Cty->Name[Language],NewCtyName,
-             Cty_MAX_BYTES_NAME);
    Cty_EditCountries ();
   }
 
@@ -1855,14 +1856,13 @@ void Cty_ChangeCtyWWW (void)
 
    Cty = &Gbl.Ctys.EditingCty;
 
-   /***** Get parameters from form *****/
-   /* Get the code of the country */
-   Cty->CtyCod = Cty_GetAndCheckParamOtherCtyCod ();
+   /***** Get the code of the country *****/
+   Cty->CtyCod = Cty_GetAndCheckParamOtherCtyCod (0);
 
-   /* Get the lenguage */
+   /***** Get the lenguage *****/
    Language = Lan_GetParamLanguage ();
 
-   /* Get the new WWW for the country */
+   /***** Get the new WWW for the country *****/
    Par_GetParToText ("WWW",NewWWW,Cns_MAX_BYTES_WWW);
 
    /***** Get from the database the data of the country *****/
@@ -1873,14 +1873,14 @@ void Cty_ChangeCtyWWW (void)
 		  " WHERE CtyCod='%03ld'",
 	    Txt_STR_LANG_ID[Language],NewWWW,Cty->CtyCod);
    DB_QueryUPDATE (Query,"can not update the web of a country");
+   Str_Copy (Cty->WWW[Language],NewWWW,
+	     Cns_MAX_BYTES_WWW);
 
    /***** Write message to show the change made *****/
    sprintf (Gbl.Alert.Txt,Txt_The_new_web_address_is_X,NewWWW);
    Ale_ShowAlert (Ale_SUCCESS,Gbl.Alert.Txt);
 
    /***** Show the form again *****/
-   Str_Copy (Cty->WWW[Language],NewWWW,
-             Cns_MAX_BYTES_WWW);
    Cty_EditCountries ();
   }
 
diff --git a/swad_country.h b/swad_country.h
index c88b303a..01c89c6b 100644
--- a/swad_country.h
+++ b/swad_country.h
@@ -101,7 +101,7 @@ void Cty_WriteCountryName (long CtyCod,const char *ClassLink);
 bool Cty_GetDataOfCountryByCod (struct Country *Cty,Cty_GetExtraData_t GetExtraData);
 void Cty_GetCountryName (long CtyCod,char CtyName[Cty_MAX_BYTES_NAME + 1]);
 void Cty_PutParamCtyCod (long CtyCod);
-long Cty_GetAndCheckParamOtherCtyCod (void);
+long Cty_GetAndCheckParamOtherCtyCod (long MinCodAllowed);
 void Cty_RemoveCountry (void);
 void Cty_RenameCountry (void);
 void Cty_ChangeCtyWWW (void);
diff --git a/swad_course.c b/swad_course.c
index 5d753d9d..fd2d36c3 100644
--- a/swad_course.c
+++ b/swad_course.c
@@ -122,7 +122,7 @@ static void Crs_PutLinkToSearchCourses (void);
 static void Sch_PutLinkToSearchCoursesParams (void);
 
 static void Crs_PutParamOtherCrsCod (long CrsCod);
-static long Crs_GetAndCheckParamOtherCrsCod (void);
+static long Crs_GetAndCheckParamOtherCrsCod (long MinCodAllowed);
 
 static void Crs_WriteRowCrsData (unsigned NumCrs,MYSQL_ROW row,bool WriteColumnAccepted);
 
@@ -1948,7 +1948,7 @@ void Crs_RemoveCourse (void)
    struct Course Crs;
 
    /***** Get course code *****/
-   Crs.CrsCod = Crs_GetAndCheckParamOtherCrsCod ();
+   Crs.CrsCod = Crs_GetAndCheckParamOtherCrsCod (1);
 
    /***** Get data of the course from database *****/
    Crs_GetDataOfCourseByCod (&Crs);
@@ -2113,16 +2113,19 @@ void Crs_RemoveCourseCompletely (long CrsCod)
   {
    char Query[128];
 
-   /***** Empty course *****/
-   Crs_EmptyCourseCompletely (CrsCod);
+   if (CrsCod > 0)
+     {
+      /***** Empty course *****/
+      Crs_EmptyCourseCompletely (CrsCod);
 
-   /***** Remove course from table of last accesses to courses in database *****/
-   sprintf (Query,"DELETE FROM crs_last WHERE CrsCod=%ld",CrsCod);
-   DB_QueryDELETE (Query,"can not remove a course");
+      /***** Remove course from table of last accesses to courses in database *****/
+      sprintf (Query,"DELETE FROM crs_last WHERE CrsCod=%ld",CrsCod);
+      DB_QueryDELETE (Query,"can not remove a course");
 
-   /***** Remove course from table of courses in database *****/
-   sprintf (Query,"DELETE FROM courses WHERE CrsCod=%ld",CrsCod);
-   DB_QueryDELETE (Query,"can not remove a course");
+      /***** Remove course from table of courses in database *****/
+      sprintf (Query,"DELETE FROM courses WHERE CrsCod=%ld",CrsCod);
+      DB_QueryDELETE (Query,"can not remove a course");
+     }
   }
 
 /*****************************************************************************/
@@ -2137,122 +2140,125 @@ static void Crs_EmptyCourseCompletely (long CrsCod)
    char PathRelCrs[PATH_MAX + 1];
    char Query[512];
 
-   /***** Get course data *****/
-   Crs.CrsCod = CrsCod;
-   Crs_GetDataOfCourseByCod (&Crs);
+   if (CrsCod > 0)
+     {
+      /***** Get course data *****/
+      Crs.CrsCod = CrsCod;
+      Crs_GetDataOfCourseByCod (&Crs);
 
-   /***** Remove all the students in the course *****/
-   Enr_RemAllStdsInCrs (&Crs);
+      /***** Remove all the students in the course *****/
+      Enr_RemAllStdsInCrs (&Crs);
 
-   /***** Set all the notifications from the course as removed,
-          except notifications about new messages *****/
-   Ntf_MarkNotifInCrsAsRemoved (-1L,CrsCod);
+      /***** Set all the notifications from the course as removed,
+	     except notifications about new messages *****/
+      Ntf_MarkNotifInCrsAsRemoved (-1L,CrsCod);
 
-   /***** Remove information of the course ****/
-   /* Remove timetable of the course */
-   sprintf (Query,"DELETE FROM timetable_crs WHERE CrsCod=%ld",CrsCod);
-   DB_QueryDELETE (Query,"can not remove the timetable of a course");
+      /***** Remove information of the course ****/
+      /* Remove timetable of the course */
+      sprintf (Query,"DELETE FROM timetable_crs WHERE CrsCod=%ld",CrsCod);
+      DB_QueryDELETE (Query,"can not remove the timetable of a course");
 
-   /* Remove other information of the course */
-   sprintf (Query,"DELETE FROM crs_info_src WHERE CrsCod=%ld",CrsCod);
-   DB_QueryDELETE (Query,"can not remove info sources of a course");
+      /* Remove other information of the course */
+      sprintf (Query,"DELETE FROM crs_info_src WHERE CrsCod=%ld",CrsCod);
+      DB_QueryDELETE (Query,"can not remove info sources of a course");
 
-   sprintf (Query,"DELETE FROM crs_info_txt WHERE CrsCod=%ld",CrsCod);
-   DB_QueryDELETE (Query,"can not remove info of a course");
+      sprintf (Query,"DELETE FROM crs_info_txt WHERE CrsCod=%ld",CrsCod);
+      DB_QueryDELETE (Query,"can not remove info of a course");
 
-   /***** Remove exam announcements in the course *****/
-   /* Mark all exam announcements in the course as deleted */
-   sprintf (Query,"UPDATE exam_announcements SET Status=%u"
-	          " WHERE CrsCod=%ld",
-            (unsigned) Exa_DELETED_EXAM_ANNOUNCEMENT,CrsCod);
-   DB_QueryUPDATE (Query,"can not remove exam announcements of a course");
+      /***** Remove exam announcements in the course *****/
+      /* Mark all exam announcements in the course as deleted */
+      sprintf (Query,"UPDATE exam_announcements SET Status=%u"
+		     " WHERE CrsCod=%ld",
+	       (unsigned) Exa_DELETED_EXAM_ANNOUNCEMENT,CrsCod);
+      DB_QueryUPDATE (Query,"can not remove exam announcements of a course");
 
-   /***** Remove course cards of the course *****/
-   /* Remove content of course cards */
-   sprintf (Query,"DELETE FROM crs_records USING crs_record_fields,crs_records"
-                  " WHERE crs_record_fields.CrsCod=%ld"
-                  " AND crs_record_fields.FieldCod=crs_records.FieldCod",
-            CrsCod);
-   DB_QueryDELETE (Query,"can not remove content of cards in a course");
+      /***** Remove course cards of the course *****/
+      /* Remove content of course cards */
+      sprintf (Query,"DELETE FROM crs_records USING crs_record_fields,crs_records"
+		     " WHERE crs_record_fields.CrsCod=%ld"
+		     " AND crs_record_fields.FieldCod=crs_records.FieldCod",
+	       CrsCod);
+      DB_QueryDELETE (Query,"can not remove content of cards in a course");
 
-   /* Remove definition of fields in course cards */
-   sprintf (Query,"DELETE FROM crs_record_fields WHERE CrsCod=%ld",CrsCod);
-   DB_QueryDELETE (Query,"can not remove fields of cards in a course");
+      /* Remove definition of fields in course cards */
+      sprintf (Query,"DELETE FROM crs_record_fields WHERE CrsCod=%ld",CrsCod);
+      DB_QueryDELETE (Query,"can not remove fields of cards in a course");
 
-   /***** Remove assignments of the course *****/
-   Asg_RemoveCrsAssignments (CrsCod);
+      /***** Remove assignments of the course *****/
+      Asg_RemoveCrsAssignments (CrsCod);
 
-   /***** Remove attendance events of the course *****/
-   Att_RemoveCrsAttEvents (CrsCod);
+      /***** Remove attendance events of the course *****/
+      Att_RemoveCrsAttEvents (CrsCod);
 
-   /***** Remove notices in the course *****/
-   /* Copy all notices from the course to table of deleted notices */
-   sprintf (Query,"INSERT INTO notices_deleted"
-	          " (NotCod,CrsCod,UsrCod,CreatTime,Content,NumNotif)"
-                  " SELECT NotCod,CrsCod,UsrCod,CreatTime,Content,NumNotif FROM notices"
-                  " WHERE CrsCod=%ld",
-            CrsCod);
-   DB_QueryINSERT (Query,"can not remove notices in a course");
-   /* Remove all notices from the course */
-   sprintf (Query,"DELETE FROM notices WHERE CrsCod=%ld",CrsCod);
-   DB_QueryDELETE (Query,"can not remove notices in a course");
+      /***** Remove notices in the course *****/
+      /* Copy all notices from the course to table of deleted notices */
+      sprintf (Query,"INSERT INTO notices_deleted"
+		     " (NotCod,CrsCod,UsrCod,CreatTime,Content,NumNotif)"
+		     " SELECT NotCod,CrsCod,UsrCod,CreatTime,Content,NumNotif FROM notices"
+		     " WHERE CrsCod=%ld",
+	       CrsCod);
+      DB_QueryINSERT (Query,"can not remove notices in a course");
+      /* Remove all notices from the course */
+      sprintf (Query,"DELETE FROM notices WHERE CrsCod=%ld",CrsCod);
+      DB_QueryDELETE (Query,"can not remove notices in a course");
 
-   /***** Remove all the threads and posts in forums of the course *****/
-   For_RemoveForums (Sco_SCOPE_CRS,CrsCod);
+      /***** Remove all the threads and posts in forums of the course *****/
+      For_RemoveForums (Sco_SCOPE_CRS,CrsCod);
 
-   /***** Remove surveys of the course *****/
-   Svy_RemoveSurveys (Sco_SCOPE_CRS,CrsCod);
+      /***** Remove surveys of the course *****/
+      Svy_RemoveSurveys (Sco_SCOPE_CRS,CrsCod);
 
-   /***** Remove all test exams made in the course *****/
-   Tst_RemoveCrsTestResults (CrsCod);
+      /***** Remove all test exams made in the course *****/
+      Tst_RemoveCrsTestResults (CrsCod);
 
-   /***** Remove all tests questions in the course *****/
-   Tst_RemoveCrsTests (CrsCod);
+      /***** Remove all tests questions in the course *****/
+      Tst_RemoveCrsTests (CrsCod);
 
-   /***** Remove groups in the course *****/
-   /* Remove all the users in groups in the course */
-   sprintf (Query,"DELETE FROM crs_grp_usr"
-	          " USING crs_grp_types,crs_grp,crs_grp_usr"
-                  " WHERE crs_grp_types.CrsCod=%ld"
-                  " AND crs_grp_types.GrpTypCod=crs_grp.GrpTypCod"
-                  " AND crs_grp.GrpCod=crs_grp_usr.GrpCod",
-            CrsCod);
-   DB_QueryDELETE (Query,"can not remove users from groups of a course");
+      /***** Remove groups in the course *****/
+      /* Remove all the users in groups in the course */
+      sprintf (Query,"DELETE FROM crs_grp_usr"
+		     " USING crs_grp_types,crs_grp,crs_grp_usr"
+		     " WHERE crs_grp_types.CrsCod=%ld"
+		     " AND crs_grp_types.GrpTypCod=crs_grp.GrpTypCod"
+		     " AND crs_grp.GrpCod=crs_grp_usr.GrpCod",
+	       CrsCod);
+      DB_QueryDELETE (Query,"can not remove users from groups of a course");
 
-   /* Remove all the groups in the course */
-   sprintf (Query,"DELETE FROM crs_grp"
-	          " USING crs_grp_types,crs_grp"
-                  " WHERE crs_grp_types.CrsCod=%ld"
-                  " AND crs_grp_types.GrpTypCod=crs_grp.GrpTypCod",
-            CrsCod);
-   DB_QueryDELETE (Query,"can not remove groups of a course");
+      /* Remove all the groups in the course */
+      sprintf (Query,"DELETE FROM crs_grp"
+		     " USING crs_grp_types,crs_grp"
+		     " WHERE crs_grp_types.CrsCod=%ld"
+		     " AND crs_grp_types.GrpTypCod=crs_grp.GrpTypCod",
+	       CrsCod);
+      DB_QueryDELETE (Query,"can not remove groups of a course");
 
-   /* Remove all the group types in the course */
-   sprintf (Query,"DELETE FROM crs_grp_types"
-	          " WHERE CrsCod=%ld",
-	    CrsCod);
-   DB_QueryDELETE (Query,"can not remove types of group of a course");
+      /* Remove all the group types in the course */
+      sprintf (Query,"DELETE FROM crs_grp_types"
+		     " WHERE CrsCod=%ld",
+	       CrsCod);
+      DB_QueryDELETE (Query,"can not remove types of group of a course");
 
-   /***** Remove users' requests for inscription in the course *****/
-   sprintf (Query,"DELETE FROM crs_usr_requests WHERE CrsCod=%ld",
-	    CrsCod);
-   DB_QueryDELETE (Query,"can not remove requests for inscription to a course");
+      /***** Remove users' requests for inscription in the course *****/
+      sprintf (Query,"DELETE FROM crs_usr_requests WHERE CrsCod=%ld",
+	       CrsCod);
+      DB_QueryDELETE (Query,"can not remove requests for inscription to a course");
 
-   /***** Remove possible users remaining in the course (teachers) *****/
-   sprintf (Query,"DELETE FROM crs_usr WHERE CrsCod=%ld",
-	    CrsCod);
-   DB_QueryDELETE (Query,"can not remove users from a course");
+      /***** Remove possible users remaining in the course (teachers) *****/
+      sprintf (Query,"DELETE FROM crs_usr WHERE CrsCod=%ld",
+	       CrsCod);
+      DB_QueryDELETE (Query,"can not remove users from a course");
 
-   /***** Remove information related to files in course *****/
-   Brw_RemoveCrsFilesFromDB (CrsCod);
+      /***** Remove information related to files in course *****/
+      Brw_RemoveCrsFilesFromDB (CrsCod);
 
-   /***** Remove directories of the course *****/
-   sprintf (PathRelCrs,"%s/%s/%ld",
-            Cfg_PATH_SWAD_PRIVATE,Cfg_FOLDER_CRS,CrsCod);
-   Fil_RemoveTree (PathRelCrs);
-   sprintf (PathRelCrs,"%s/%s/%ld",
-            Cfg_PATH_SWAD_PUBLIC,Cfg_FOLDER_CRS,CrsCod);
-   Fil_RemoveTree (PathRelCrs);
+      /***** Remove directories of the course *****/
+      sprintf (PathRelCrs,"%s/%s/%ld",
+	       Cfg_PATH_SWAD_PRIVATE,Cfg_FOLDER_CRS,CrsCod);
+      Fil_RemoveTree (PathRelCrs);
+      sprintf (PathRelCrs,"%s/%s/%ld",
+	       Cfg_PATH_SWAD_PUBLIC,Cfg_FOLDER_CRS,CrsCod);
+      Fil_RemoveTree (PathRelCrs);
+     }
   }
 
 /*****************************************************************************/
@@ -2295,7 +2301,7 @@ void Crs_ChangeInsCrsCod (void)
 
    /***** Get parameters from form *****/
    /* Get course code */
-   Gbl.Degs.EditingCrs.CrsCod = Crs_GetAndCheckParamOtherCrsCod ();
+   Gbl.Degs.EditingCrs.CrsCod = Crs_GetAndCheckParamOtherCrsCod (1);
 
    /* Get institutional code */
    Par_GetParToText ("InsCrsCod",NewInstitutionalCrsCod,Crs_MAX_BYTES_INSTITUTIONAL_CRS_COD);
@@ -2339,7 +2345,7 @@ void Crs_ChangeCrsDegInConfig (void)
    struct Degree NewDeg;
 
    /***** Get parameter with degree code *****/
-   NewDeg.DegCod = Deg_GetAndCheckParamOtherDegCod ();
+   NewDeg.DegCod = Deg_GetAndCheckParamOtherDegCod (1);
 
    /***** Check if degree has changed *****/
    if (NewDeg.DegCod != Gbl.CurrentCrs.Crs.DegCod)
@@ -2477,7 +2483,7 @@ void Crs_ChangeCrsYear (void)
 
    /***** Get parameters from form *****/
    /* Get course code */
-   Gbl.Degs.EditingCrs.CrsCod = Crs_GetAndCheckParamOtherCrsCod ();
+   Gbl.Degs.EditingCrs.CrsCod = Crs_GetAndCheckParamOtherCrsCod (1);
 
    /* Get parameter with year */
    Par_GetParToText ("OthCrsYear",YearStr,2);
@@ -2572,7 +2578,7 @@ void Crs_UpdateInstitutionalCrsCod (struct Course *Crs,const char *NewInstitutio
 
 void Crs_RenameCourseShort (void)
   {
-   Gbl.Degs.EditingCrs.CrsCod = Crs_GetAndCheckParamOtherCrsCod ();
+   Gbl.Degs.EditingCrs.CrsCod = Crs_GetAndCheckParamOtherCrsCod (1);
    Crs_RenameCourse (&Gbl.Degs.EditingCrs,Cns_SHRT_NAME);
   }
 
@@ -2587,7 +2593,7 @@ void Crs_RenameCourseShortInConfig (void)
 
 void Crs_RenameCourseFull (void)
   {
-   Gbl.Degs.EditingCrs.CrsCod = Crs_GetAndCheckParamOtherCrsCod ();
+   Gbl.Degs.EditingCrs.CrsCod = Crs_GetAndCheckParamOtherCrsCod (1);
    Crs_RenameCourse (&Gbl.Degs.EditingCrs,Cns_FULL_NAME);
   }
 
@@ -2732,7 +2738,7 @@ void Crs_ChangeCrsStatus (void)
 
    /***** Get parameters from form *****/
    /* Get course code */
-   Gbl.Degs.EditingCrs.CrsCod = Crs_GetAndCheckParamOtherCrsCod ();
+   Gbl.Degs.EditingCrs.CrsCod = Crs_GetAndCheckParamOtherCrsCod (1);
 
    /* Get parameter with status */
    Status = (Crs_Status_t)
@@ -2938,13 +2944,13 @@ static void Crs_PutParamOtherCrsCod (long CrsCod)
 /********************* Get parameter with code of course *********************/
 /*****************************************************************************/
 
-static long Crs_GetAndCheckParamOtherCrsCod (void)
+static long Crs_GetAndCheckParamOtherCrsCod (long MinCodAllowed)
   {
    long CrsCod;
 
    /***** Get and check parameter with code of course *****/
-   if ((CrsCod = Par_GetParToLong ("OthCrsCod")) <= 0)
-      Lay_ShowErrorAndExit ("Code of course is missing.");
+   if ((CrsCod = Par_GetParToLong ("OthCrsCod")) < MinCodAllowed)
+      Lay_ShowErrorAndExit ("Code of course is missing or invalid.");
 
    return CrsCod;
   }
diff --git a/swad_degree.c b/swad_degree.c
index 98548d8f..8398000c 100644
--- a/swad_degree.c
+++ b/swad_degree.c
@@ -1543,8 +1543,7 @@ static void Deg_RecFormRequestOrCreateDeg (unsigned Status)
    Par_GetParToText ("FullName",Gbl.Degs.EditingDeg.FullName,Hie_MAX_BYTES_FULL_NAME);
 
    /* Get degree type */
-   if ((Gbl.Degs.EditingDeg.DegTypCod = DT_GetParamOtherDegTypCod ()) <= 0)
-      Ale_ShowAlert (Ale_ERROR,"Wrong type of degree.");
+   Gbl.Degs.EditingDeg.DegTypCod = DT_GetAndCheckParamOtherDegTypCod (1);
 
    /* Get degree WWW */
    Par_GetParToText ("WWW",Gbl.Degs.EditingDeg.WWW,Cns_MAX_BYTES_WWW);
@@ -1597,7 +1596,7 @@ void Deg_RemoveDegree (void)
    struct Degree Deg;
 
    /***** Get degree code *****/
-   Deg.DegCod = Deg_GetAndCheckParamOtherDegCod ();
+   Deg.DegCod = Deg_GetAndCheckParamOtherDegCod (1);
 
    /***** Get data of degree *****/
    Deg_GetDataOfDegreeByCod (&Deg);
@@ -1642,13 +1641,13 @@ static void Deg_PutParamOtherDegCod (long DegCod)
 /********************* Get parameter with code of degree *********************/
 /*****************************************************************************/
 
-long Deg_GetAndCheckParamOtherDegCod (void)
+long Deg_GetAndCheckParamOtherDegCod (long MinCodAllowed)
   {
    long DegCod;
 
    /***** Get and check parameter with code of degree *****/
-   if ((DegCod = Par_GetParToLong ("OthDegCod")) <= 0)
-      Lay_ShowErrorAndExit ("Code of degree is missing.");
+   if ((DegCod = Par_GetParToLong ("OthDegCod")) < MinCodAllowed)
+      Lay_ShowErrorAndExit ("Code of degree is missing or invalid.");
 
    return DegCod;
   }
@@ -1902,7 +1901,7 @@ void Deg_RemoveDegreeCompletely (long DegCod)
 
 void Deg_RenameDegreeShort (void)
   {
-   Gbl.Degs.EditingDeg.DegCod = Deg_GetAndCheckParamOtherDegCod ();
+   Gbl.Degs.EditingDeg.DegCod = Deg_GetAndCheckParamOtherDegCod (1);
    Deg_RenameDegree (&Gbl.Degs.EditingDeg,Cns_SHRT_NAME);
   }
 
@@ -1917,7 +1916,7 @@ void Deg_RenameDegreeShortInConfig (void)
 
 void Deg_RenameDegreeFull (void)
   {
-   Gbl.Degs.EditingDeg.DegCod = Deg_GetAndCheckParamOtherDegCod ();
+   Gbl.Degs.EditingDeg.DegCod = Deg_GetAndCheckParamOtherDegCod (1);
    Deg_RenameDegree (&Gbl.Degs.EditingDeg,Cns_FULL_NAME);
   }
 
@@ -2047,7 +2046,7 @@ void Deg_ChangeDegCtrInConfig (void)
    struct Centre NewCtr;
 
    /***** Get parameter with centre code *****/
-   NewCtr.CtrCod = Ctr_GetAndCheckParamOtherCtrCod ();
+   NewCtr.CtrCod = Ctr_GetAndCheckParamOtherCtrCod (1);
 
    /***** Check if centre has changed *****/
    if (NewCtr.CtrCod != Gbl.CurrentDeg.Deg.CtrCod)
@@ -2126,7 +2125,7 @@ void Deg_ChangeDegWWW (void)
 
    /***** Get parameters from form *****/
    /* Get the code of the degree */
-   Gbl.Degs.EditingDeg.DegCod = Deg_GetAndCheckParamOtherDegCod ();
+   Gbl.Degs.EditingDeg.DegCod = Deg_GetAndCheckParamOtherDegCod (1);
 
    /* Get the new WWW for the degree */
    Par_GetParToText ("WWW",NewWWW,Cns_MAX_BYTES_WWW);
@@ -2211,7 +2210,7 @@ void Deg_ChangeDegStatus (void)
 
    /***** Get parameters from form *****/
    /* Get degree code */
-   Gbl.Degs.EditingDeg.DegCod = Deg_GetAndCheckParamOtherDegCod ();
+   Gbl.Degs.EditingDeg.DegCod = Deg_GetAndCheckParamOtherDegCod (1);
 
    /* Get parameter with status */
    Status = (Deg_Status_t)
diff --git a/swad_degree.h b/swad_degree.h
index 0e02e09a..9b73fea5 100644
--- a/swad_degree.h
+++ b/swad_degree.h
@@ -112,7 +112,7 @@ void Deg_RecFormNewDeg (void);
 void Deg_RemoveDegree (void);
 
 void Deg_PutParamDegCod (long DegCod);
-long Deg_GetAndCheckParamOtherDegCod (void);
+long Deg_GetAndCheckParamOtherDegCod (long MinCodAllowed);
 
 bool Deg_GetDataOfDegreeByCod (struct Degree *Deg);
 void Deg_GetShortNameOfDegreeByCod (struct Degree *Deg);
diff --git a/swad_degree_type.c b/swad_degree_type.c
index 5362d4f4..34244cec 100644
--- a/swad_degree_type.c
+++ b/swad_degree_type.c
@@ -746,8 +746,7 @@ void DT_RemoveDegreeType (void)
    struct DegreeType DegTyp;
 
    /***** Get the code of the degree type *****/
-   if ((DegTyp.DegTypCod = DT_GetParamOtherDegTypCod ()) == -1L)
-      Lay_ShowErrorAndExit ("Code of type of degree is missing.");
+   DegTyp.DegTypCod = DT_GetAndCheckParamOtherDegTypCod (1);
 
    /***** Get data of the degree type from database *****/
    if (!DT_GetDataOfDegreeTypeByCod (&DegTyp))
@@ -784,10 +783,15 @@ static void DT_PutParamOtherDegTypCod (long DegTypCod)
 /******************* Get parameter with code of degree type ******************/
 /*****************************************************************************/
 
-long DT_GetParamOtherDegTypCod (void)
+long DT_GetAndCheckParamOtherDegTypCod (long MinCodAllowed)
   {
-   /***** Get code of degree type *****/
-   return Par_GetParToLong ("OthDegTypCod");
+   long DegTypCod;
+
+   /***** Get and check parameter with code of degree type *****/
+   if ((DegTypCod = Par_GetParToLong ("OthDegTypCod")) < MinCodAllowed)
+      Lay_ShowErrorAndExit ("Code of degree type is missing or invalid.");
+
+   return DegTypCod;
   }
 
 /*****************************************************************************/
@@ -919,8 +923,7 @@ void DT_RenameDegreeType (void)
 
    /***** Get parameters from form *****/
    /* Get the code of the degree type */
-   if ((DegTyp->DegTypCod = DT_GetParamOtherDegTypCod ()) == -1L)
-      Lay_ShowErrorAndExit ("Code of type of degree is missing.");
+   DegTyp->DegTypCod = DT_GetAndCheckParamOtherDegTypCod (1);
 
    /* Get the new name for the degree type */
    Par_GetParToText ("DegTypName",NewNameDegTyp,Deg_MAX_BYTES_DEGREE_TYPE_NAME);
@@ -1003,10 +1006,10 @@ void DT_ChangeDegreeType (void)
 
    /***** Get parameters from form *****/
    /* Get degree code */
-   Gbl.Degs.EditingDeg.DegCod = Deg_GetAndCheckParamOtherDegCod ();
+   Gbl.Degs.EditingDeg.DegCod = Deg_GetAndCheckParamOtherDegCod (1);
 
    /* Get the new degree type */
-   NewDegTypCod = DT_GetParamOtherDegTypCod ();
+   NewDegTypCod = DT_GetAndCheckParamOtherDegTypCod (1);
 
    /***** Get data of degree *****/
    Deg_GetDataOfDegreeByCod (&Gbl.Degs.EditingDeg);
diff --git a/swad_degree_type.h b/swad_degree_type.h
index 8d8a4597..4bbf8b45 100644
--- a/swad_degree_type.h
+++ b/swad_degree_type.h
@@ -74,7 +74,7 @@ void DT_RecFormNewDegreeType (void);
 
 void DT_RemoveDegreeType (void);
 
-long DT_GetParamOtherDegTypCod (void);
+long DT_GetAndCheckParamOtherDegTypCod (long MinCodAllowed);
 
 bool DT_GetDataOfDegreeTypeByCod (struct DegreeType *DegTyp);
 void DT_RenameDegreeType (void);
diff --git a/swad_department.c b/swad_department.c
index b79875c6..d464d701 100644
--- a/swad_department.c
+++ b/swad_department.c
@@ -601,13 +601,18 @@ static void Dpt_PutParamDptCod (long DptCod)
   }
 
 /*****************************************************************************/
-/******************* Get parameter with code of degree type ******************/
+/******************* Get parameter with code of department *******************/
 /*****************************************************************************/
 
-long Dpt_GetParamDptCod (void)
+long Dpt_GetAndCheckParamDptCod (long MinCodAllowed)
   {
-   /***** Get code of department *****/
-   return Par_GetParToLong ("DptCod");
+   long DptCod;
+
+   /***** Get and check parameter with code of department *****/
+   if ((DptCod = Par_GetParToLong ("DptCod")) < MinCodAllowed)
+      Lay_ShowErrorAndExit ("Code of department is missing or invalid.");
+
+   return DptCod;
   }
 
 /*****************************************************************************/
@@ -622,8 +627,7 @@ void Dpt_RemoveDepartment (void)
    struct Department Dpt;
 
    /***** Get department code *****/
-   if ((Dpt.DptCod = Dpt_GetParamDptCod ()) == -1L)
-      Lay_ShowErrorAndExit ("Code of department is missing.");
+   Dpt.DptCod = Dpt_GetAndCheckParamDptCod (1);
 
    /***** Get data of the department from database *****/
    Dpt_GetDataOfDepartmentByCod (&Dpt);
@@ -661,11 +665,10 @@ void Dpt_ChangeDepartIns (void)
 
    /***** Get parameters from form *****/
    /* Get the code of the department */
-   if ((Dpt->DptCod = Dpt_GetParamDptCod ()) == -1L)
-      Lay_ShowErrorAndExit ("Code of department is missing.");
+   Dpt->DptCod = Dpt_GetAndCheckParamDptCod (1);
 
    /* Get parameter with institution code */
-   Dpt->InsCod = Ins_GetAndCheckParamOtherInsCod ();
+   Dpt->InsCod = Ins_GetAndCheckParamOtherInsCod (1);
 
    /***** Update institution in table of departments *****/
    sprintf (Query,"UPDATE departments SET InsCod=%ld WHERE DptCod=%ld",
@@ -733,8 +736,7 @@ static void Dpt_RenameDepartment (Cns_ShrtOrFullName_t ShrtOrFullName)
 
    /***** Get parameters from form *****/
    /* Get the code of the department */
-   if ((Dpt->DptCod = Dpt_GetParamDptCod ()) == -1L)
-      Lay_ShowErrorAndExit ("Code of department is missing.");
+   Dpt->DptCod = Dpt_GetAndCheckParamDptCod (1);
 
    /* Get the new name for the department */
    Par_GetParToText (ParamName,NewDptName,MaxBytes);
@@ -831,8 +833,7 @@ void Dpt_ChangeDptWWW (void)
 
    /***** Get parameters from form *****/
    /* Get the code of the department */
-   if ((Dpt->DptCod = Dpt_GetParamDptCod ()) == -1L)
-      Lay_ShowErrorAndExit ("Code of department is missing.");
+   Dpt->DptCod = Dpt_GetAndCheckParamDptCod (1);
 
    /* Get the new WWW for the department */
    Par_GetParToText ("WWW",NewWWW,Cns_MAX_BYTES_WWW);
@@ -1020,7 +1021,7 @@ void Dpt_RecFormNewDpt (void)
 
    /***** Get parameters from form *****/
    /* Get institution */
-   Dpt->InsCod = Ins_GetAndCheckParamOtherInsCod ();
+   Dpt->InsCod = Ins_GetAndCheckParamOtherInsCod (1);
 
    /* Get department short name */
    Par_GetParToText ("ShortName",Dpt->ShrtName,Hie_MAX_BYTES_SHRT_NAME);
diff --git a/swad_department.h b/swad_department.h
index 3edf6547..f315d8b1 100644
--- a/swad_department.h
+++ b/swad_department.h
@@ -61,7 +61,7 @@ void Dpt_GetListDepartments (long InsCod);
 void Dpt_FreeListDepartments (void);
 unsigned Dpt_GetNumDepartmentsInInstitution (long InsCod);
 void Dpt_GetDataOfDepartmentByCod (struct Department *Dpt);
-long Dpt_GetParamDptCod (void);
+long Dpt_GetAndCheckParamDptCod (long MinCodAllowed);
 void Dpt_RemoveDepartment (void);
 void Dpt_ChangeDepartIns (void);
 void Dpt_RenameDepartShort (void);
diff --git a/swad_indicator.c b/swad_indicator.c
index 8ee21d8b..7eed413f 100644
--- a/swad_indicator.c
+++ b/swad_indicator.c
@@ -222,11 +222,12 @@ static void Ind_GetParamsIndicators (void)
    Sco_GetScope ("ScopeInd");
 
    /***** Get degree type code *****/
-   Gbl.Stat.DegTypCod = (Gbl.Scope.Current == Sco_SCOPE_SYS) ? DT_GetParamOtherDegTypCod () :
-                                                               -1L;
+   Gbl.Stat.DegTypCod = (Gbl.Scope.Current == Sco_SCOPE_SYS) ?
+	                DT_GetAndCheckParamOtherDegTypCod (-1L) :	// -1L (any degree type) is allowed here
+                        -1L;
 
    /***** Get department code *****/
-   Gbl.Stat.DptCod = Dpt_GetParamDptCod ();
+   Gbl.Stat.DptCod = Dpt_GetAndCheckParamDptCod (-1L);	// -1L (any department) is allowed here
 
    /***** Get number of indicators *****/
    Ind_GetParamNumIndicators ();
diff --git a/swad_institution.c b/swad_institution.c
index 9e5958e6..2e326bf4 100644
--- a/swad_institution.c
+++ b/swad_institution.c
@@ -1641,13 +1641,13 @@ static void Ins_PutParamOtherInsCod (long InsCod)
 /******************* Get parameter with code of institution ******************/
 /*****************************************************************************/
 
-long Ins_GetAndCheckParamOtherInsCod (void)
+long Ins_GetAndCheckParamOtherInsCod (long MinCodAllowed)
   {
    long InsCod;
 
    /***** Get and check parameter with code of institution *****/
-   if ((InsCod = Ins_GetParamOtherInsCod ()) < 0)
-      Lay_ShowErrorAndExit ("Code of institution is missing.");
+   if ((InsCod = Ins_GetParamOtherInsCod ()) < MinCodAllowed)
+      Lay_ShowErrorAndExit ("Code of institution is missing or invalid.");
 
    return InsCod;
   }
@@ -1671,7 +1671,7 @@ void Ins_RemoveInstitution (void)
    char PathIns[PATH_MAX + 1];
 
    /***** Get institution code *****/
-   Ins.InsCod = Ins_GetAndCheckParamOtherInsCod ();
+   Ins.InsCod = Ins_GetAndCheckParamOtherInsCod (1);
 
    /***** Get data of the institution from database *****/
    Ins_GetDataOfInstitutionByCod (&Ins,Ins_GET_EXTRA_DATA);
@@ -1722,7 +1722,7 @@ void Ins_RemoveInstitution (void)
 
 void Ins_RenameInsShort (void)
   {
-   Gbl.Inss.EditingIns.InsCod = Ins_GetAndCheckParamOtherInsCod ();
+   Gbl.Inss.EditingIns.InsCod = Ins_GetAndCheckParamOtherInsCod (1);
    Ins_RenameInstitution (&Gbl.Inss.EditingIns,Cns_SHRT_NAME);
   }
 
@@ -1737,7 +1737,7 @@ void Ins_RenameInsShortInConfig (void)
 
 void Ins_RenameInsFull (void)
   {
-   Gbl.Inss.EditingIns.InsCod = Ins_GetAndCheckParamOtherInsCod ();
+   Gbl.Inss.EditingIns.InsCod = Ins_GetAndCheckParamOtherInsCod (1);
    Ins_RenameInstitution (&Gbl.Inss.EditingIns,Cns_FULL_NAME);
   }
 
@@ -1867,7 +1867,7 @@ void Ins_ChangeInsCtyInConfig (void)
    struct Country NewCty;
 
    /***** Get the new country code for the institution *****/
-   NewCty.CtyCod = Cty_GetAndCheckParamOtherCtyCod ();
+   NewCty.CtyCod = Cty_GetAndCheckParamOtherCtyCod (0);
 
    /***** Check if country has changed *****/
    if (NewCty.CtyCod != Gbl.CurrentIns.Ins.CtyCod)
@@ -1945,7 +1945,7 @@ void Ins_ChangeInsWWW (void)
 
    /***** Get parameters from form *****/
    /* Get the code of the institution */
-   Gbl.Inss.EditingIns.InsCod = Ins_GetAndCheckParamOtherInsCod ();
+   Gbl.Inss.EditingIns.InsCod = Ins_GetAndCheckParamOtherInsCod (1);
 
    /* Get the new WWW for the institution */
    Par_GetParToText ("WWW",NewWWW,Cns_MAX_BYTES_WWW);
@@ -2030,7 +2030,7 @@ void Ins_ChangeInsStatus (void)
 
    /***** Get parameters from form *****/
    /* Get institution code */
-   Gbl.Inss.EditingIns.InsCod = Ins_GetAndCheckParamOtherInsCod ();
+   Gbl.Inss.EditingIns.InsCod = Ins_GetAndCheckParamOtherInsCod (1);
 
    /* Get parameter with status */
    Status = (Ins_Status_t)
diff --git a/swad_institution.h b/swad_institution.h
index 15609f45..70a3c719 100644
--- a/swad_institution.h
+++ b/swad_institution.h
@@ -111,7 +111,7 @@ void Ins_GetShortNameOfInstitutionByCod (struct Instit *Ins);
 void Ins_FreeListInstitutions (void);
 void Ins_WriteSelectorOfInstitution (void);
 void Ins_PutParamInsCod (long InsCod);
-long Ins_GetAndCheckParamOtherInsCod (void);
+long Ins_GetAndCheckParamOtherInsCod (long MinCodAllowed);
 void Ins_RemoveInstitution (void);
 void Ins_RenameInsShort (void);
 void Ins_RenameInsShortInConfig (void);
diff --git a/swad_photo.c b/swad_photo.c
index 8024066a..65cd8df1 100644
--- a/swad_photo.c
+++ b/swad_photo.c
@@ -1334,7 +1334,7 @@ void Pho_CalcPhotoDegree (void)
    Fil_RemoveOldTmpFiles (PathPhotosTmpPriv,Cfg_TIME_TO_DELETE_PHOTOS_TMP_FILES,false);
 
    /***** Get the degree which photo will be computed *****/
-   DegCod = Deg_GetAndCheckParamOtherDegCod ();
+   DegCod = Deg_GetAndCheckParamOtherDegCod (1);
 
    /***** Prevent the computing of an average photo too recently updated *****/
    if (Pho_GetTimeAvgPhotoWasComputed (DegCod) >=
diff --git a/swad_record.c b/swad_record.c
index 69acf5cb..2dbe7438 100644
--- a/swad_record.c
+++ b/swad_record.c
@@ -4249,7 +4249,7 @@ void Rec_ShowFormMyInsCtrDpt (void)
 void Rec_ChgCountryOfMyInstitution (void)
   {
    /***** Get country code of my institution *****/
-   Gbl.Usrs.Me.UsrDat.InsCtyCod = Cty_GetAndCheckParamOtherCtyCod ();
+   Gbl.Usrs.Me.UsrDat.InsCtyCod = Cty_GetAndCheckParamOtherCtyCod (0);
 
    /***** Update institution, centre and department *****/
    // When country changes, the institution, centre and department must be reset
@@ -4272,7 +4272,7 @@ void Rec_UpdateMyInstitution (void)
 
    /***** Get my institution *****/
    /* Get institution code */
-   Ins.InsCod = Ins_GetAndCheckParamOtherInsCod ();
+   Ins.InsCod = Ins_GetAndCheckParamOtherInsCod (0);	// 0 (another institution) is allowed here
 
    /* Get country of institution */
    if (Ins.InsCod > 0)
@@ -4302,7 +4302,7 @@ void Rec_UpdateMyCentre (void)
 
    /***** Get my centre *****/
    /* Get centre code */
-   Ctr.CtrCod = Ctr_GetAndCheckParamOtherCtrCod ();
+   Ctr.CtrCod = Ctr_GetAndCheckParamOtherCtrCod (0);	// 0 (another centre) is allowed here
 
    /* Get institution of centre */
    if (Ctr.CtrCod > 0)
@@ -4333,8 +4333,7 @@ void Rec_UpdateMyDepartment (void)
 
    /***** Get my department *****/
    /* Get department code */
-   if ((Dpt.DptCod = Dpt_GetParamDptCod ()) < 0)
-      Lay_ShowErrorAndExit ("Code of department is missing.");
+   Dpt.DptCod = Dpt_GetAndCheckParamDptCod (0);	// 0 (another department) is allowed here
 
    /* Get institution of department */
    if (Dpt.DptCod > 0)