Index: lams_common/src/java/org/lamsfoundation/lams/usermanagement/service/UserManagementService.java
===================================================================
diff -u -rf8da3934756eb50a727203ceab526ca4fc6ebb20 -rf51ccc4bb67ebb489c7d251428f3d123c0cd56e5
--- lams_common/src/java/org/lamsfoundation/lams/usermanagement/service/UserManagementService.java	(.../UserManagementService.java)	(revision f8da3934756eb50a727203ceab526ca4fc6ebb20)
+++ lams_common/src/java/org/lamsfoundation/lams/usermanagement/service/UserManagementService.java	(.../UserManagementService.java)	(revision f51ccc4bb67ebb489c7d251428f3d123c0cd56e5)
@@ -356,7 +356,8 @@
 	}
 
 	public User getUserByLogin(String login) {
-		return (User)baseDAO.findByProperty(User.class,"login",login).get(0);
+		List results = baseDAO.findByProperty(User.class,"login",login);
+		return results.isEmpty() ? null : (User)results.get(0);
 	}
 
 	public void updatePassword(String login, String password) {