diff --git a/swad_changelog.h b/swad_changelog.h
index f1aed5112..f02db698f 100644
--- a/swad_changelog.h
+++ b/swad_changelog.h
@@ -252,13 +252,14 @@
 /****************************** Public constants *****************************/
 /*****************************************************************************/
 
-#define Log_PLATFORM_VERSION	"SWAD 17.4 (2017-09-20)"
+#define Log_PLATFORM_VERSION	"SWAD 17.4.1 (2017-09-20)"
 #define CSS_FILE		"swad17.0.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 17.4.1:   Sep 20, 2017	Changes adding users to a project. Not finished. (230141 lines)
         Version 17.4:     Sep 20, 2017	Actions to add users to a project. (230137 lines)
 					6 changes necessary in database:
 INSERT INTO actions (ActCod,Language,Obsolete,Txt) VALUES ('1684','es','N','Solicitar ID añadir estudiante a proyecto');
diff --git a/swad_enrolment.c b/swad_enrolment.c
index ef27f8e34..0539d5768 100644
--- a/swad_enrolment.c
+++ b/swad_enrolment.c
@@ -346,10 +346,10 @@ static void Enr_NotifyAfterEnrolment (struct UsrData *UsrDat,Rol_Role_t NewRole)
   }
 
 /*****************************************************************************/
-/****** Write a form to request another user's ID, @nickname or email *******/
+/****** Write a form to request another user's ID, @nickname or email ********/
 /*****************************************************************************/
 
-void Enr_WriteFormToReqAnotherUsrID (Act_Action_t NextAction)
+void Enr_WriteFormToReqAnotherUsrID (Act_Action_t NextAction,void (*FuncParams) ())
   {
    extern const char *The_ClassForm[The_NUM_THEMES];
    extern const char *Txt_nick_email_or_ID;
@@ -357,6 +357,8 @@ void Enr_WriteFormToReqAnotherUsrID (Act_Action_t NextAction)
 
    /***** Form to request user's ID, @nickname or email address *****/
    Act_FormStart (NextAction);
+   if (FuncParams)
+      FuncParams ();
    fprintf (Gbl.F.Out,"<label class=\"%s RIGHT_MIDDLE\">"
                       "%s:&nbsp;"
                       "<input type=\"text\" name=\"OtherUsrIDNickOrEMail\""
@@ -3152,7 +3154,7 @@ static void Enr_ReqAnotherUsrIDToRegisterRemove (Rol_Role_t Role)
          Lay_ShowErrorAndExit ("Wrong role.");
 	 break;
      }
-   Enr_WriteFormToReqAnotherUsrID (NextAction);
+   Enr_WriteFormToReqAnotherUsrID (NextAction,NULL);
 
    /***** End box *****/
    Box_EndBox ();
diff --git a/swad_enrolment.h b/swad_enrolment.h
index f739ed4d1..d22d338cf 100644
--- a/swad_enrolment.h
+++ b/swad_enrolment.h
@@ -79,7 +79,7 @@ void Enr_ModifyRoleInCurrentCrs (struct UsrData *UsrDat,Rol_Role_t NewRole);
 void Enr_RegisterUsrInCurrentCrs (struct UsrData *UsrDat,Rol_Role_t NewRole,
                                   Enr_KeepOrSetAccepted_t KeepOrSetAccepted);
 
-void Enr_WriteFormToReqAnotherUsrID (Act_Action_t NextAction);
+void Enr_WriteFormToReqAnotherUsrID (Act_Action_t NextAction,void (*FuncParams) ());
 
 void Enr_ReqAcceptRegisterInCrs (void);
 void Enr_GetNotifEnrolment (char SummaryStr[Ntf_MAX_BYTES_SUMMARY + 1],
diff --git a/swad_project.c b/swad_project.c
index c4bf8d232..261fa452b 100644
--- a/swad_project.c
+++ b/swad_project.c
@@ -85,7 +85,7 @@ static void Prj_ShowOneProjectUsrsRow (const struct Project *Prj,bool PrintView,
                                        const char *Label,Prj_RoleInProject_t RoleInProject);
 static void Prj_WriteUsrs (long PrjCod,Prj_RoleInProject_t RoleInProject);
 static void Prj_ReqAnotherUsrID (Prj_RoleInProject_t RoleInProject);
-static void Prj_AddUsrToProject (Prj_RoleInProject_t RoleInProject)
+static void Prj_AddUsrToProject (Prj_RoleInProject_t RoleInProject);
 
 static void Prj_GetParamPrjOrder (void);
 
@@ -549,7 +549,7 @@ static void Prj_WriteUsrs (long PrjCod,Prj_RoleInProject_t RoleInProject)
    bool UsrValid;
    bool ShowPhoto;
    char PhotoURL[PATH_MAX + 1];
-   Act_Action_t ActionReqAddUsr[Prj_NUM_ROLES_IN_PROJECT] =
+   static Act_Action_t ActionReqAddUsr[Prj_NUM_ROLES_IN_PROJECT] =
      {
       ActUnk,		// Prj_ROLE_UNK, Unknown
       ActReqAddStdPrj,	// Prj_ROLE_STD, Student
@@ -673,15 +673,11 @@ void Prj_ReqAddRev (void)
    Prj_ReqAnotherUsrID (Prj_ROLE_REV);
   }
 
-/*****************************************************************************/
-/****** Write a form to request another user's ID, @nickname or email ********/
-/*****************************************************************************/
-
 static void Prj_ReqAnotherUsrID (Prj_RoleInProject_t RoleInProject)
   {
    extern const char *Hlp_ASSESSMENT_Projects_add_user;
    extern const char *Txt_Add_user;
-   Act_Action_t ActionAddUsr[Prj_NUM_ROLES_IN_PROJECT] =
+   static Act_Action_t ActionAddUsr[Prj_NUM_ROLES_IN_PROJECT] =
      {
       ActUnk,		// Prj_ROLE_UNK, Unknown
       ActAddStdPrj,	// Prj_ROLE_STD, Student
@@ -689,12 +685,16 @@ static void Prj_ReqAnotherUsrID (Prj_RoleInProject_t RoleInProject)
       ActAddRevPrj,	// Prj_ROLE_REV, Reviewer
      };
 
+   /***** Get project code *****/
+   if ((Gbl.Prjs.PrjCodToEdit = Prj_GetParamPrjCod ()) == -1L)
+      Lay_ShowErrorAndExit ("Code of project is missing.");
+
    /***** Start box *****/
    Box_StartBox (NULL,Txt_Add_user,NULL,
                  Hlp_ASSESSMENT_Projects_add_user,Box_NOT_CLOSABLE);
 
    /***** Write form to request another user's ID *****/
-   Enr_WriteFormToReqAnotherUsrID (ActionAddUsr[RoleInProject]);
+   Enr_WriteFormToReqAnotherUsrID (ActionAddUsr[RoleInProject],Prj_PutParams);
 
    /***** End box *****/
    Box_EndBox ();
@@ -721,7 +721,8 @@ void Prj_AddRev (void)
 
 static void Prj_AddUsrToProject (Prj_RoleInProject_t RoleInProject)
   {
-   Ale_ShowAlert (Ale_WARNING,"Not yet implemented.");
+   if (RoleInProject != Prj_ROLE_UNK)	// TODO: Remove
+      Ale_ShowAlert (Ale_WARNING,"Not yet implemented.");
   }
 
 /*****************************************************************************/