diff --git a/workflow/engine/classes/class.wsBase.php b/workflow/engine/classes/class.wsBase.php
index 1d5f75d3c..6161c78d0 100755
--- a/workflow/engine/classes/class.wsBase.php
+++ b/workflow/engine/classes/class.wsBase.php
@@ -2878,10 +2878,6 @@ class wsBase
              */
             $oCriteria = new Criteria( 'workflow' );
             $aConditions = array ();
-            // $aConditions[] = array(AppDelegationPeer::USR_UID, TaskUserPeer::USR_UID);
-            // $aConditions[] = array(AppDelegationPeer::TAS_UID, TaskUserPeer::TAS_UID);
-            // $oCriteria->addJoinMC($aConditions, Criteria::LEFT_JOIN);
-            //$oCriteria->addJoin(AppDelegationPeer::USR_UID, TaskUserPeer::USR_UID, Criteria::LEFT_JOIN);
             $oCriteria->add( AppDelegationPeer::APP_UID, $caseId );
             $oCriteria->add( AppDelegationPeer::USR_UID, $userIdSource );
             $oCriteria->add( AppDelegationPeer::DEL_INDEX, $delIndex );
diff --git a/workflow/engine/classes/model/AppDelegation.php b/workflow/engine/classes/model/AppDelegation.php
index 5cf980c93..472f0a695 100755
--- a/workflow/engine/classes/model/AppDelegation.php
+++ b/workflow/engine/classes/model/AppDelegation.php
@@ -738,6 +738,20 @@ class AppDelegation extends BaseAppDelegation
         return $data['TAS_UID'];
     }
 
+    public function getCurrentUsers($appUid, $index)
+    {
+        $oCriteria = new Criteria();
+        $oCriteria->addSelectColumn( AppDelegationPeer::USR_UID );
+        $oCriteria->add( AppDelegationPeer::APP_UID, $appUid );
+        $oCriteria->add( AppDelegationPeer::DEL_THREAD_STATUS, 'OPEN' );
+        $oCriteria->add( AppDelegationPeer::DEL_INDEX, $index );
+        $oRuleSet = AppDelegationPeer::doSelectRS( $oCriteria );
+        $oRuleSet->setFetchmode( ResultSet::FETCHMODE_ASSOC );
+        $oRuleSet->next();
+        $data = $oRuleSet->getRow();
+        return $data;
+    }
+
     /**
     * Verify if the current case is already routed.
     *
diff --git a/workflow/engine/methods/cases/ajaxListener.php b/workflow/engine/methods/cases/ajaxListener.php
index 7aa28ba5e..cd818a2cf 100755
--- a/workflow/engine/methods/cases/ajaxListener.php
+++ b/workflow/engine/methods/cases/ajaxListener.php
@@ -194,7 +194,9 @@ class Ajax
                 $options[] = Array('text' => G::LoadTranslation('ID_DELETE'), 'fn' => 'deleteCase');
 
                 if ($RBAC->userCanAccess('PM_REASSIGNCASE') == 1) {
-                    $options[] = Array('text' => G::LoadTranslation('ID_REASSIGN'), 'fn' => 'getUsersToReassign');
+                    if (!AppDelay::isPaused($_SESSION['APPLICATION'], $_SESSION['INDEX'])) {
+                        $options[] = Array('text' => G::LoadTranslation('ID_REASSIGN'), 'fn' => 'getUsersToReassign');
+                    }
                 }
                 break;
             case 'TO_DO':
@@ -211,7 +213,9 @@ class Ajax
                     $options[] = Array('text' => G::LoadTranslation('ID_UNPAUSE'), 'fn' => 'unpauseCase');
                 }
                 if ($RBAC->userCanAccess('PM_REASSIGNCASE') == 1 || $RBAC->userCanAccess('PM_SUPERVISOR') == 1) {
-                    $options[] = Array('text' => G::LoadTranslation('ID_REASSIGN'), 'fn' => 'getUsersToReassign');
+                    if (!AppDelay::isPaused($_SESSION['APPLICATION'], $_SESSION['INDEX'])) {
+                        $options[] = Array('text' => G::LoadTranslation('ID_REASSIGN'), 'fn' => 'getUsersToReassign');
+                    }
                 }
                 break;
             case 'CANCELLED':
@@ -597,10 +601,31 @@ class Ajax
         $user = new Users();
         $app = new Application();
         $result = new stdclass();
+        $oAppDel = new AppDelegation();
 
         $TO_USR_UID = $_POST['USR_UID'];
         try {
-            $cases->reassignCase($_SESSION['APPLICATION'], $_SESSION['INDEX'], $_SESSION['USER_LOGGED'], $TO_USR_UID);
+            //Current users of OPEN DEL_INDEX thread
+            if(isset($_SESSION['APPLICATION']) && isset($_SESSION['INDEX'])){
+                $aCurUser = $oAppDel->getCurrentUsers($_SESSION['APPLICATION'], $_SESSION['INDEX']);
+            }
+            $flagReassign = true;
+            if(!empty($aCurUser)){
+                foreach ($aCurUser as $key => $value) {
+                    if($value === $TO_USR_UID){
+                        $flagReassign = false;
+                    }
+                }
+            } else {
+                //DEL_INDEX is CLOSED
+                throw new Exception(G::LoadTranslation('ID_REASSIGNMENT_ERROR'));
+            }
+
+            //If the currentUser is diferent to nextUser, create the thread
+            if($flagReassign){
+                $cases->reassignCase($_SESSION['APPLICATION'], $_SESSION['INDEX'], $_SESSION['USER_LOGGED'], $TO_USR_UID);
+            }
+
             $caseData = $app->load($_SESSION['APPLICATION']);
             $userData = $user->load($TO_USR_UID);
 
@@ -608,7 +633,7 @@ class Ajax
             $data['USER'] = $userData['USR_LASTNAME'] . ' ' . $userData['USR_FIRSTNAME']; //TODO change with the farmated username from environment conf
             $result->status = 0;
             $result->msg = G::LoadTranslation('ID_REASSIGNMENT_SUCCESS', SYS_LANG, $data);
-            
+
             // Save the note reassign reason
             if (isset($_POST['NOTE_REASON']) && $_POST['NOTE_REASON'] !== '') {
                 require_once ("classes/model/AppNotes.php");
diff --git a/workflow/engine/methods/cases/proxySaveReassignCasesList.php b/workflow/engine/methods/cases/proxySaveReassignCasesList.php
index 1570616c5..154626421 100755
--- a/workflow/engine/methods/cases/proxySaveReassignCasesList.php
+++ b/workflow/engine/methods/cases/proxySaveReassignCasesList.php
@@ -28,8 +28,7 @@ foreach ($items as $item) {
     $dataUids = explode( "|", $item );
     $appSelectedUids[] = $dataUids[0];
 }
-// var_dump($aData);
-//var_dump($appSelectedUids);
+
 $casesReassignedCount = 0;
 $serverResponse = array ();
 G::LoadClass( 'case' );
@@ -37,6 +36,7 @@ $oCases = new Cases();
 require_once ('classes/model/Task.php');
 require_once ('classes/model/AppCacheView.php');
 $oAppCacheView = new AppCacheView();
+$oAppDel = new AppDelegation();
 $oCasesReassignList = $oAppCacheView->getToReassignListCriteria(null);
 if (isset( $_POST['selected'] ) && $_POST['selected'] == 'true') {
     $oCasesReassignList->add( AppCacheViewPeer::APP_UID, $appSelectedUids, Criteria::IN );
@@ -47,9 +47,7 @@ if (empty( $aData )) {
     echo G::json_encode( $serverResponse );
     die();
 }
-//      $params = array ();
-//      $sql = BasePeer::createSelectSql($oCasesReassignList, $params);
-//      var_dump($sql);
+
 if (is_array( $aData )) {
     $currentCasesReassigned = 0;
     require_once ("classes/model/AppNotes.php");
@@ -61,13 +59,31 @@ if (is_array( $aData )) {
         $rs->setFetchmode( ResultSet::FETCHMODE_ASSOC );
         $rs->next();
         $row = $rs->getRow();
-        //$aCase = $oCases->loadCaseInCurrentDelegation( $data->APP_UID );
-        $oCases->reassignCase( $row['APP_UID'], $row['DEL_INDEX'], ($row['USR_UID'] != '' ? $row['USR_UID'] : $_SESSION['USER_LOGGED']), $data->APP_REASSIGN_USER_UID );
+
+        //Current users of OPEN DEL_INDEX thread
+        $aCurUser = $oAppDel->getCurrentUsers($row['APP_UID'], $row['DEL_INDEX']);
+        $flagReassign = true;
+        if(!empty($aCurUser)){
+            foreach ($aCurUser as $key => $value) {
+                if($value === $data->APP_REASSIGN_USER_UID){
+                    $flagReassign = false;
+                }
+            }
+        } else {
+            //DEL_INDEX is CLOSED
+            throw new Exception(G::LoadTranslation('ID_REASSIGNMENT_ERROR'));
+        }
+
+        //If the currentUser is diferent to nextUser, create the thread
+        if($flagReassign){
+            $oCases->reassignCase( $row['APP_UID'], $row['DEL_INDEX'], ($row['USR_UID'] != '' ? $row['USR_UID'] : $_SESSION['USER_LOGGED']), $data->APP_REASSIGN_USER_UID );
+        }
+
         $currentCasesReassigned ++;
         $casesReassignedCount ++;
         $serverResponse[] = array ('APP_REASSIGN_USER' => $data->APP_REASSIGN_USER,'APP_TITLE' => $data->APP_TITLE,'TAS_TITLE' => $data->APP_TAS_TITLE,'REASSIGNED_CASES' => $currentCasesReassigned
         );
-        
+
         // Save the note reassign reason
         if (isset($data->NOTE_REASON) && $data->NOTE_REASON !== '') {
             $appNotes = new AppNotes();
@@ -86,11 +102,28 @@ if (is_array( $aData )) {
     while (is_array( $row )) {
         $APP_UID = $row['APP_UID'];
         $aCase = $oCases->loadCaseInCurrentDelegation( $APP_UID );
-        $oCases->reassignCase( $aCase['APP_UID'], $aCase['DEL_INDEX'], ($aCase['USR_UID'] != '' ? $aCase['USR_UID'] : $_SESSION['USER_LOGGED']), $aData->APP_REASSIGN_USER_UID );
+
+        //Current users of OPEN DEL_INDEX thread
+        $aCurUser = $oAppDel->getCurrentUsers($APP_UID, $aCase['DEL_INDEX']);
+        $flagReassign = true;
+        if(!empty($aCurUser)){
+            foreach ($aCurUser as $key => $value) {
+                if($value === $aData->APP_REASSIGN_USER_UID){
+                    $flagReassign = false;
+                }
+            }
+        } else {
+            //DEL_INDEX is CLOSED
+            throw new Exception(G::LoadTranslation('ID_REASSIGNMENT_ERROR'));
+        }
+
+        //If the currentUser is diferent to nextUser, create the thread
+        if($flagReassign){
+            $oCases->reassignCase( $aCase['APP_UID'], $aCase['DEL_INDEX'], ($aCase['USR_UID'] != '' ? $aCase['USR_UID'] : $_SESSION['USER_LOGGED']), $aData->APP_REASSIGN_USER_UID );
+        }
+
         $currentCasesReassigned ++;
         $casesReassignedCount ++;
-        //              var_dump($aCase);
-        //              echo ("<br>");
         $rs->next();
         $row = $rs->getRow();
     }