diff --git a/swad_changelog.h b/swad_changelog.h
index b17624466..ba6103014 100644
--- a/swad_changelog.h
+++ b/swad_changelog.h
@@ -125,17 +125,20 @@
 // TODO: Modify WS function getUsers changing: userRole to indicate all users, and a new parameter filter (search string (name, @nickname, mail)) to restring number of users
 // TODO: Add a new WS function to count the nunmber of users to return in call to function getUsers
 
+// TODO: Search should be restricted by default to the smaller (down in hierarchy) scope
+
 /*****************************************************************************/
 /****************************** Public constants *****************************/
 /*****************************************************************************/
 
-#define Log_PLATFORM_VERSION	"SWAD 15.231 (2016-06-24)"
+#define Log_PLATFORM_VERSION	"SWAD 15.231.1 (2016-06-24)"
 #define CSS_FILE		"swad15.229.css"
 #define JS_FILE			"swad15.226.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 15.231.1: Jun 24, 2015	All users can search guests. (? lines)
         Version 15.231:   Jun 24, 2015	Speed up in search of users by using temporary tables. (203427 lines)
         Version 15.230.4: Jun 23, 2015	Optimization in search of users. (203369 lines)
         Version 15.230.3: Jun 23, 2015	Optimization in search of users. (203378 lines)
diff --git a/swad_search.c b/swad_search.c
index 8385dc5c1..d12781a72 100644
--- a/swad_search.c
+++ b/swad_search.c
@@ -297,7 +297,7 @@ static bool Sch_CheckIfIHavePermissionToSearch (Sch_WhatToSearch_t WhatToSearch)
       0x1FF,	// Sch_SEARCH_COURSES
       0x1FF,	// Sch_SEARCH_TEACHERS
       0x1FF,	// Sch_SEARCH_STUDENTS
-      0x100,	// Sch_SEARCH_GUESTS			Only if I am a system admin
+      0x1FF,	// Sch_SEARCH_GUESTS
       0x1FF,	// Sch_SEARCH_OPEN_DOCUMENTS
       0x1FE,	// Sch_SEARCH_DOCUM_IN_MY_COURSES	Only if I am logged
       0x1FE,	// Sch_SEARCH_MY_DOCUMENTS		Only if I am logged
diff --git a/swad_user.c b/swad_user.c
index cd952128f..8cf9f3bbd 100644
--- a/swad_user.c
+++ b/swad_user.c
@@ -144,7 +144,7 @@ static void Usr_WriteUsrData (const char *BgColor,
 static void Usr_BuildQueryToGetUsrsLstCrs (Rol_Role_t Role,char *Query);
 static void Usr_SearchListUsrs (Rol_Role_t Role);
 static void Usr_CreateTmpTableAndSearchCandidateUsrs (const char *UsrQuery);
-static void Usr_CreateExtraTmpTables (void);
+static void Usr_CreateExtraTmpTablesForSearch (void);
 static void Usr_CloneTmpTableCandidateUsers (unsigned NumCopy);
 static void Usr_DropTmpTablesWithCandidateUsrs (void);
 
@@ -3905,7 +3905,7 @@ static void Usr_SearchListUsrs (Rol_Role_t Role)
 			   (unsigned) Role);
 		  break;
 	       default:			// I am logged
-		  Usr_CreateExtraTmpTables ();
+		  Usr_CreateExtraTmpTablesForSearch ();
 		  sprintf (Query,"SELECT list_usrs.UsrCod,usr_data.Sex FROM "
 				    "("
 				    // Users whose privacy is
@@ -4001,7 +4001,7 @@ static void Usr_SearchListUsrs (Rol_Role_t Role)
 			   Gbl.CurrentCty.Cty.CtyCod);
 		  break;
 	       default:			// I am logged
-		  Usr_CreateExtraTmpTables ();
+		  Usr_CreateExtraTmpTablesForSearch ();
 		  sprintf (Query,"SELECT list_usrs.UsrCod,usr_data.Sex FROM "
 				    "("
 				    // Users whose privacy is
@@ -4114,7 +4114,7 @@ static void Usr_SearchListUsrs (Rol_Role_t Role)
 			   Gbl.CurrentIns.Ins.InsCod);
 		  break;
 	       default:			// I am logged
-		  Usr_CreateExtraTmpTables ();
+		  Usr_CreateExtraTmpTablesForSearch ();
 		  sprintf (Query,"SELECT list_usrs.UsrCod,usr_data.Sex FROM "
 				    "("
 				    // Users whose privacy is
@@ -4223,7 +4223,7 @@ static void Usr_SearchListUsrs (Rol_Role_t Role)
 			   Gbl.CurrentCtr.Ctr.CtrCod);
 		  break;
 	       default:			// I am logged
-		  Usr_CreateExtraTmpTables ();
+		  Usr_CreateExtraTmpTablesForSearch ();
 		  sprintf (Query,"SELECT list_usrs.UsrCod,usr_data.Sex FROM "
 				    "("
 				    // Users whose privacy is
@@ -4328,7 +4328,7 @@ static void Usr_SearchListUsrs (Rol_Role_t Role)
 			   Gbl.CurrentDeg.Deg.DegCod);
 		  break;
 	       default:			// I am logged
-		  Usr_CreateExtraTmpTables ();
+		  Usr_CreateExtraTmpTablesForSearch ();
 		  sprintf (Query,"SELECT list_usrs.UsrCod,usr_data.Sex FROM "
 				    "("
 				    // Users whose privacy is
@@ -4428,7 +4428,7 @@ static void Usr_SearchListUsrs (Rol_Role_t Role)
 			   Gbl.CurrentCrs.Crs.CrsCod);
 		  break;
 	       default:		// I am logged
-		  Usr_CreateExtraTmpTables ();
+		  Usr_CreateExtraTmpTablesForSearch ();
 		  sprintf (Query,"SELECT DISTINCT list_usrs.UsrCod,usr_data.Sex,crs_usr.Accepted FROM "
 				    "("
 				    // Users whose privacy is
@@ -4518,10 +4518,10 @@ static void Usr_CreateTmpTableAndSearchCandidateUsrs (const char *UsrQuery)
   }
 
 /*****************************************************************************/
-/************** Create more temporary tables users in search *****************/
+/************** Create more temporary tables for search users ****************/
 /*****************************************************************************/
 
-static void Usr_CreateExtraTmpTables (void)
+static void Usr_CreateExtraTmpTablesForSearch (void)
   {
    char Query[256];