diff --git a/workflow/engine/classes/class.pmDynaform.php b/workflow/engine/classes/class.pmDynaform.php
index d2f8354be..f88c6b441 100644
--- a/workflow/engine/classes/class.pmDynaform.php
+++ b/workflow/engine/classes/class.pmDynaform.php
@@ -678,6 +678,7 @@ class pmDynaform
                 var sysLang = \"" . SYS_LANG . "\";
                 var isRTL = \"" . $this->isRTL . "\";
                 var pathRTLCss = \"" . $this->pathRTLCss . "\";
+                var delIndex = " . (isset($this->fields["DEL_INDEX"]) ? $this->fields["DEL_INDEX"] : "null") . ";
                 $(window).load(function ()
                 {
                     var data = jsondata;
@@ -736,6 +737,7 @@ class pmDynaform
                 "var sysLang = '" . SYS_LANG . "';\n" .
                 "var isRTL = " . $this->isRTL . ";\n" .
                 "var pathRTLCss = '" . $this->pathRTLCss . "';\n" .
+                "var delIndex = " . (isset($this->fields["DEL_INDEX"]) ? $this->fields["DEL_INDEX"] : "null") . ";\n" .
                 "$(window).load(function () {\n" .
                 "    var data = jsondata;\n" .
                 "    window.dynaform = new PMDynaform.core.Project({\n" .
@@ -811,6 +813,7 @@ class pmDynaform
                 "var sysLang = '" . SYS_LANG . "';\n" .
                 "var isRTL = " . $this->isRTL . ";\n" .
                 "var pathRTLCss = '" . $this->pathRTLCss . "';\n" .
+                "var delIndex = " . (isset($this->fields["DEL_INDEX"]) ? $this->fields["DEL_INDEX"] : "null") . ";\n" .
                 "</script>\n" .
                 "<script type='text/javascript' src='/jscore/cases/core/cases_Step.js'></script>\n" .
                 "<script type='text/javascript' src='/jscore/cases/core/pmDynaform.js'></script>\n" .
@@ -866,6 +869,7 @@ class pmDynaform
             var sysLang = \"" . SYS_LANG . "\";
             var isRTL = \"" . $this->isRTL . "\";
             var pathRTLCss = \"" . $this->pathRTLCss . "\";
+            var delIndex = " . (isset($this->fields["DEL_INDEX"]) ? $this->fields["DEL_INDEX"] : "null") . ";
         </script>
 
         <script type=\"text/javascript\" src=\"/jscore/cases/core/pmDynaform.js\"></script>
@@ -908,6 +912,7 @@ class pmDynaform
                 "var sysLang = '" . SYS_LANG . "';\n" .
                 "var isRTL = " . $this->isRTL . ";\n" .
                 "var pathRTLCss = '" . $this->pathRTLCss . "';\n" .
+                "var delIndex = " . (isset($this->fields["DEL_INDEX"]) ? $this->fields["DEL_INDEX"] : "null") . ";\n" .
                 "</script>\n" .
                 "<script type='text/javascript' src='/jscore/cases/core/pmDynaform.js'></script>\n" .
                 "<div style='width:100%;padding: 0px 10px 0px 10px;margin:15px 0px 0px 0px;'>\n" .
@@ -948,6 +953,7 @@ class pmDynaform
                 "var sysLang = '" . SYS_LANG . "';\n" .
                 "var isRTL = " . $this->isRTL . ";\n" .
                 "var pathRTLCss = '" . $this->pathRTLCss . "';\n" .
+                "var delIndex = " . (isset($this->fields["DEL_INDEX"]) ? $this->fields["DEL_INDEX"] : "null") . ";\n" .
                 "</script>\n" .
                 "<script type='text/javascript' src='/jscore/cases/core/pmDynaform.js'></script>\n" .
                 "<div style='width:100%;padding: 0px 10px 0px 10px;margin:15px 0px 0px 0px;'>\n" .
@@ -1007,6 +1013,7 @@ class pmDynaform
                 "var sysLang = '" . SYS_LANG . "';\n" .
                 "var isRTL = " . $this->isRTL . ";\n" .
                 "var pathRTLCss = '" . $this->pathRTLCss . "';\n" .
+                "var delIndex = " . (isset($this->fields["DEL_INDEX"]) ? $this->fields["DEL_INDEX"] : "null") . ";\n" .
                 "</script>\n" .
                 "<script type='text/javascript' src='/jscore/cases/core/pmDynaform.js'></script>\n" .
                 "<div style='width:100%;padding: 0px 10px 0px 10px;margin:15px 0px 0px 0px;'>\n" .
diff --git a/workflow/engine/src/ProcessMaker/BusinessModel/Cases.php b/workflow/engine/src/ProcessMaker/BusinessModel/Cases.php
index 0b39df0d3..6456fde2f 100644
--- a/workflow/engine/src/ProcessMaker/BusinessModel/Cases.php
+++ b/workflow/engine/src/ProcessMaker/BusinessModel/Cases.php
@@ -2914,5 +2914,25 @@ class Cases
 
         return G::json_encode($dataResponse);
     }
+    
+    /**
+     * if case already routed
+     * 
+     * @param type $app_uid
+     * @param type $del_index
+     * @param type $usr_uid
+     * @throws type
+     */
+    public function caseAlreadyRouted($app_uid, $del_index, $usr_uid = '')
+    {
+        $c = new \Criteria('workflow');
+        $c->add(\AppDelegationPeer::APP_UID, $app_uid);
+        $c->add(\AppDelegationPeer::DEL_INDEX, $del_index);
+        if (!empty($usr_uid)) {
+            $c->add(\AppDelegationPeer::USR_UID, $usr_uid);
+        }
+        $c->add(\AppDelegationPeer::DEL_FINISH_DATE, null, \Criteria::ISNULL);
+        return !(boolean) \AppDelegationPeer::doCount($c);
+    }
 }
 
diff --git a/workflow/engine/src/ProcessMaker/Services/Api/Light.php b/workflow/engine/src/ProcessMaker/Services/Api/Light.php
index 709a0a4ff..f3bbd6e78 100644
--- a/workflow/engine/src/ProcessMaker/Services/Api/Light.php
+++ b/workflow/engine/src/ProcessMaker/Services/Api/Light.php
@@ -1542,8 +1542,16 @@ class Light extends Api
     public function doPutCaseVariables($app_uid, $request_data, $dyn_uid = '', $del_index = 0)
     {
         try {
+            if ($del_index === null) {
+                throw (new \Exception(G::LoadTranslation('ID_CAN_NOT_BE_NULL', array('del_index')), Api::STAT_APP_EXCEPTION));
+            }
             $usr_uid = $this->getUserId();
             $cases = new \ProcessMaker\BusinessModel\Cases();
+            if ($del_index > 0) {
+                if ($cases->caseAlreadyRouted($app_uid, $del_index, $usr_uid)) {
+                    throw (new \Exception(G::LoadTranslation('ID_CASE_ALREADY_DERIVATED'), Api::STAT_APP_EXCEPTION));
+                }
+            }
             $request_data = \ProcessMaker\Util\DateTime::convertDataToUtc($request_data);
             $cases->setCaseVariables($app_uid, $request_data, $dyn_uid, $usr_uid, $del_index);
         } catch (\Exception $e) {