diff --git a/workflow/engine/classes/class.wsTools.php b/workflow/engine/classes/class.wsTools.php
index 365b758a5..1330363c8 100644
--- a/workflow/engine/classes/class.wsTools.php
+++ b/workflow/engine/classes/class.wsTools.php
@@ -3671,7 +3671,7 @@ class workspaceTools
             . 'USR_ID=(SELECT USR_ID FROM USERS WHERE USERS.USR_UID=LIST_UNASSIGNED_GROUP.USR_UID)');
         $con->commit();
 
-        CLI::logging("-> Populating PRO_ID, USR_ID aat LIST_*  Done \n");
+        CLI::logging("-> Populating PRO_ID, USR_ID at LIST_*  Done \n");
     }
 
 }
diff --git a/workflow/engine/classes/model/ListInbox.php b/workflow/engine/classes/model/ListInbox.php
index 372167426..a12806af5 100644
--- a/workflow/engine/classes/model/ListInbox.php
+++ b/workflow/engine/classes/model/ListInbox.php
@@ -160,7 +160,7 @@ class ListInbox extends BaseListInbox
 
         $p = new Process();
         if (!empty($data['PRO_UID'])) {
-            $data['PRO_ID'] =  $p->load($data['PRO_UID'])['PRO_ID'];
+            $data['PRO_ID'] = $p->load($data['PRO_UID'])['PRO_ID'];
         }
         $u = new Users();
         if (!empty($data['USR_UID'])) {
diff --git a/workflow/engine/classes/model/ListMyInbox.php b/workflow/engine/classes/model/ListMyInbox.php
index fbf8a2c7a..f20ef41f5 100644
--- a/workflow/engine/classes/model/ListMyInbox.php
+++ b/workflow/engine/classes/model/ListMyInbox.php
@@ -65,7 +65,9 @@ class ListMyInbox extends BaseListMyInbox
     public function update($data)
     {
         $p = new Process();
-        $data['PRO_ID'] = $p->load($data['PRO_UID'])['PRO_ID'];
+        if(!empty($data['PRO_UID'])) {
+            $data['PRO_ID'] = $p->load($data['PRO_UID'])['PRO_ID'];
+        }
         $u = new Users();
         if(!empty($data['USR_UID'])) {
             $data['USR_ID'] = $data['USR_UID']==='SELF_SERVICES' ? null : $u->load($data['USR_UID'])['USR_ID'];
diff --git a/workflow/engine/classes/model/ListUnassignedGroup.php b/workflow/engine/classes/model/ListUnassignedGroup.php
index 5bd90dda6..242f7802f 100644
--- a/workflow/engine/classes/model/ListUnassignedGroup.php
+++ b/workflow/engine/classes/model/ListUnassignedGroup.php
@@ -54,6 +54,7 @@ class ListUnassignedGroup extends BaseListUnassignedGroup {
      */
     public function update($data)
     {
+        $u = new Users();
         if(!empty($data['USR_UID'])) {
             $data['USR_ID'] = $data['USR_UID']==='SELF_SERVICES' ? null : $u->load($data['USR_UID'])['USR_ID'];
         }