diff --git a/workflow/engine/content/translations/english/processmaker.en.po b/workflow/engine/content/translations/english/processmaker.en.po
index 731b29178..2e3e9a890 100644
--- a/workflow/engine/content/translations/english/processmaker.en.po
+++ b/workflow/engine/content/translations/english/processmaker.en.po
@@ -27293,6 +27293,12 @@ msgstr "Please try later."
 msgid "There was a problem sending the email to"
 msgstr "There was a problem sending the email to"
 
+# TRANSLATION
+# LABEL/ID_USER_CANT_BE_DELETED_FOR_THE_PROCESS
+#: LABEL/ID_USER_CANT_BE_DELETED_FOR_THE_PROCESS
+msgid "The user can't be deleted because it is referenced in the process {processTitle} in a process permission."
+msgstr "The user can't be deleted because it is referenced in the process {processTitle} in a process permission."
+
 # TRANSLATION
 # LABEL/ID_MAFE_c5d84b6c19cb058b7b5471b30e926823
 #: LABEL/ID_MAFE_c5d84b6c19cb058b7b5471b30e926823
diff --git a/workflow/engine/data/mssql/insert.sql b/workflow/engine/data/mssql/insert.sql
index c6c4f357c..55b0c19b7 100755
--- a/workflow/engine/data/mssql/insert.sql
+++ b/workflow/engine/data/mssql/insert.sql
@@ -10612,6 +10612,8 @@ SELECT 'LABEL','ID_PLEASE_TRY_LATER','en','Please try later.','2016-03-30'
   UNION ALL
 SELECT 'LABEL','ID_THERE_PROBLEM_SENDING_EMAIL','en','There was a problem sending the email to','2016-03-30' 
   UNION ALL
+SELECT 'LABEL','ID_USER_CANT_BE_DELETED_FOR_THE_PROCESS','en','The user can''t be deleted because it is referenced in the process {processTitle} in a process permission.','2016-04-18' 
+  UNION ALL
 SELECT 'LABEL','ID_MAFE_c5d84b6c19cb058b7b5471b30e926823','en','Invalid operation: Delete message flow before converting it to','2016-03-30' 
   UNION ALL
 SELECT 'LABEL','ID_MAFE_be1a57f7e1cfe44284e71c5175874967','en','Event','2016-03-30' 
diff --git a/workflow/engine/data/mysql/insert.sql b/workflow/engine/data/mysql/insert.sql
index 3a8f99cfe..a10adf9fe 100644
--- a/workflow/engine/data/mysql/insert.sql
+++ b/workflow/engine/data/mysql/insert.sql
@@ -6069,6 +6069,7 @@ INSERT INTO TRANSLATION (TRN_CATEGORY,TRN_ID,TRN_LANG,TRN_VALUE,TRN_UPDATE_DATE
 ( 'LABEL','ID_UNABLE_TO_SEND_EMAIL','en','Unable to send email, the task is closed.','2016-03-30') ,
 ( 'LABEL','ID_PLEASE_TRY_LATER','en','Please try later.','2016-03-30') ,
 ( 'LABEL','ID_THERE_PROBLEM_SENDING_EMAIL','en','There was a problem sending the email to','2016-03-30') ,
+( 'LABEL','ID_USER_CANT_BE_DELETED_FOR_THE_PROCESS','en','The user can''t be deleted because it is referenced in the process {processTitle} in a process permission.','2016-04-18') ,
 ( 'LABEL','ID_MAFE_c5d84b6c19cb058b7b5471b30e926823','en','Invalid operation: Delete message flow before converting it to','2016-03-30') ,
 ( 'LABEL','ID_MAFE_be1a57f7e1cfe44284e71c5175874967','en','Event','2016-03-30') ,
 ( 'LABEL','ID_MAFE_d8012aca7276ee78d2e2bd33861d72a1','en','At least one object should be selected in order to execute the action.','2016-03-30') ,
diff --git a/workflow/engine/methods/users/users_Ajax.php b/workflow/engine/methods/users/users_Ajax.php
index 92457619e..03653c328 100644
--- a/workflow/engine/methods/users/users_Ajax.php
+++ b/workflow/engine/methods/users/users_Ajax.php
@@ -197,6 +197,34 @@ try {
             break;
         case 'deleteUser':
             $UID = $_POST['USR_UID'];
+            
+            //process permissions
+            $criteria = new Criteria("workflow");
+            $criteria->addSelectColumn(ObjectPermissionPeer::USR_UID);
+            $criteria->addSelectColumn(ObjectPermissionPeer::PRO_UID);
+            $criteria->add(ObjectPermissionPeer::OP_USER_RELATION, 1, Criteria::EQUAL);
+            $criteria->add(ObjectPermissionPeer::USR_UID, $UID, Criteria::EQUAL);
+            $doSelectRS = DynaformPeer::doSelectRS($criteria);
+            $doSelectRS->setFetchmode(ResultSet::FETCHMODE_ASSOC);
+            $doSelectRS->next();
+            $objectPermision = $doSelectRS->getRow();
+            if (isset($objectPermision["USR_UID"])) {
+                $criteria = new Criteria("workflow");
+                $criteria->addSelectColumn(ContentPeer::CON_VALUE);
+                $criteria->add(ContentPeer::CON_CATEGORY, 'PRO_TITLE', Criteria::EQUAL);
+                $criteria->add(ContentPeer::CON_ID, $objectPermision["PRO_UID"], Criteria::EQUAL);
+                $criteria->add(ContentPeer::CON_LANG, SYS_LANG, Criteria::EQUAL);
+                $doSelectRS = ContentPeer::doSelectRS($criteria);
+                $doSelectRS->setFetchmode(ResultSet::FETCHMODE_ASSOC);
+                $doSelectRS->next();
+                $content = $doSelectRS->getRow();
+                echo G::json_encode(array(
+                    "status" => 'ERROR',
+                    "message" => G::LoadTranslation('ID_USER_CANT_BE_DELETED_FOR_THE_PROCESS', array('processTitle' => isset($content["CON_VALUE"]) ? $content["CON_VALUE"] : $objectPermision['PRO_UID']))
+                ));
+                break;
+            }
+
             G::LoadClass('tasks');
             $oTasks = new Tasks();
             $oTasks->ofToAssignUserOfAllTasks($UID);
diff --git a/workflow/engine/templates/users/usersList.js b/workflow/engine/templates/users/usersList.js
index a386e9da7..6ec0e316d 100755
--- a/workflow/engine/templates/users/usersList.js
+++ b/workflow/engine/templates/users/usersList.js
@@ -638,6 +638,11 @@ DeleteUser = function(uid){
   url: 'users_Ajax',
   params: {'function': 'deleteUser', USR_UID: uid},
   success: function(res, opt){
+    var response = Ext.util.JSON.decode(res.responseText);
+    if (response.status === 'ERROR') {
+        Ext.Msg.alert(_('ID_USERS'), response.message);
+        return;
+    }
     DoSearch();
     PMExt.notify(_('ID_USERS'),_('ID_USERS_SUCCESS_DELETE'));
   },