diff --git a/workflow/engine/classes/class.case.php b/workflow/engine/classes/class.case.php
index b069420d4..be9b5ef3c 100644
--- a/workflow/engine/classes/class.case.php
+++ b/workflow/engine/classes/class.case.php
@@ -1225,6 +1225,35 @@ class Cases
         }
     }
 
+
+  /*
+  * Determines if the all threads of a multiinstance task are closed
+  *
+  * @$appUid string appUid of the instance to be tested
+  * @$tasUid string task uid of the multiinstance task
+  * @$previousDelIndex int previous del index of the instance corresponding to the multiinstance task
+  */
+
+    public function multiInstanceIsCompleted($appUid, $tasUid, $previousDelIndex)
+    {
+        try {
+            $c = new Criteria();
+            $c->clearSelectColumns();
+            $c->addSelectColumn('COUNT(*)');
+            $c->add(AppDelegationPeer::APP_UID, $appUid);
+            $c->add(AppDelegationPeer::TAS_UID, $tasUid);
+            $c->add(AppDelegationPeer::DEL_PREVIOUS, $previousDelIndex);
+            $c->add(AppDelegationPeer::DEL_THREAD_STATUS, 'OPEN');
+            $rs = AppDelegationPeer::doSelectRs($c);
+            $rs->next();
+            $row = $rs->getRow();
+            //if no open threads exists, the multiinstance is completes
+            return intval($row[0]) === 0;
+        } catch (exception $e) {
+            throw ($e);
+        }
+    }
+
     /*
      * GetOpenThreads
      *
diff --git a/workflow/engine/classes/class.derivation.php b/workflow/engine/classes/class.derivation.php
index a6d883abd..a320848ae 100644
--- a/workflow/engine/classes/class.derivation.php
+++ b/workflow/engine/classes/class.derivation.php
@@ -1003,12 +1003,27 @@ class Derivation
                 case TASK_FINISH_TASK:
                     $iAppThreadIndex = $appFields['DEL_THREAD'];
                     $this->case->closeAppThread($currentDelegation['APP_UID'], $iAppThreadIndex);
+
                     if (isset($nextDel["TAS_UID_DUMMY"]) && !$flagTaskAssignTypeIsMultipleInstance) {
                         $taskDummy = TaskPeer::retrieveByPK($nextDel["TAS_UID_DUMMY"]);
                         if (preg_match("/^(?:END-MESSAGE-EVENT|END-EMAIL-EVENT)$/", $taskDummy->getTasType())) {
                             $this->executeEvent($nextDel["TAS_UID_DUMMY"], $appFields, $flagFirstIteration, true);
                         }
                     }
+
+                    //if the next task is an end event and the multiinstance threads are finished the end event
+                    //is triggered:
+                    if (isset($nextDel["TAS_UID_DUMMY"]) && $flagTaskAssignTypeIsMultipleInstance) {
+                        $taskDummy = TaskPeer::retrieveByPK($nextDel["TAS_UID_DUMMY"]);
+                        $currentDeltegionAllData = AppDelegationPeer::retrieveByPK($currentDelegation['APP_UID'], $currentDelegation['DEL_INDEX']);
+                        if ($this->case->multiInstanceIsCompleted($currentDeltegionAllData->getAppUid(),
+                                                                    $currentDeltegionAllData->getTasUid(),
+                                                                    $currentDeltegionAllData->getDelPrevious()
+                                && preg_match("/^(?:END-MESSAGE-EVENT|END-EMAIL-EVENT)$/", $taskDummy->getTasType()))) {
+                            $this->executeEvent($nextDel["TAS_UID_DUMMY"], $appFields, $flagFirstIteration, true);
+                        }
+                    }
+
                     $this->case->closeAppThread($currentDelegation['APP_UID'], $iAppThreadIndex);
                     $aContext['action'] = 'finish-task';
                     //Logger