diff --git a/workflow/engine/classes/class.pmDynaform.php b/workflow/engine/classes/class.pmDynaform.php
index 7df0110d1..6c98d3f34 100644
--- a/workflow/engine/classes/class.pmDynaform.php
+++ b/workflow/engine/classes/class.pmDynaform.php
@@ -681,7 +681,7 @@ class pmDynaform
                         $this->fields["APP_DATA"] = $dataGridEnvironment;
                         $dataGridEnvironment = [];
                     }
-                    if (isset($this->fields["APP_DATA"][$json->name])) {
+                    if (isset($this->fields["APP_DATA"][$json->name]) && is_array($this->fields["APP_DATA"][$json->name])) {
                         //rows
                         $rows = $this->fields["APP_DATA"][$json->name];
                         foreach ($rows as $keyRow => $row) {