diff --git a/gulliver/system/class.xmlform.php b/gulliver/system/class.xmlform.php
index 972e022e4..72270dc2c 100755
--- a/gulliver/system/class.xmlform.php
+++ b/gulliver/system/class.xmlform.php
@@ -5509,6 +5509,9 @@ class xmlformTemplate extends Smarty
             if (! is_array( $value )) {
                 if ($form->type == 'grid') {
                     $aAux = array ();
+                    if (!isset($form->values[$form->name])) {
+                        $form->values[$form->name] = array();
+                    }
                     if ($therow == - 1) {
                         for ($i = 0; $i < count( $form->values[$form->name] ); $i ++) {
                             $aAux[] = '';
diff --git a/workflow/engine/classes/class.dashletRssReader.php b/workflow/engine/classes/class.dashletRssReader.php
index cc1b935ea..3fbf024d4 100644
--- a/workflow/engine/classes/class.dashletRssReader.php
+++ b/workflow/engine/classes/class.dashletRssReader.php
@@ -67,6 +67,7 @@ class dashletRssReader implements DashletInterface
             ) );
         }
 
+        $self = new stdclass();
         $self->rss = @simplexml_load_string( curl_exec( $pCurl ) );
         if ($self->rss) {
             $index = 0;
diff --git a/workflow/engine/classes/class.dynaFormField.php b/workflow/engine/classes/class.dynaFormField.php
index 3d1ab37d1..8183e29e0 100755
--- a/workflow/engine/classes/class.dynaFormField.php
+++ b/workflow/engine/classes/class.dynaFormField.php
@@ -216,6 +216,9 @@ class DynaFormField extends DBTable
         }
 
         // parent::Save();
+        if (!isset($Fields['XMLNODE_VALUE'])) {
+            $Fields['XMLNODE_VALUE'] = '';
+        }
         if (trim($Fields['XMLNODE_VALUE']) != "") {
             $attributes['#cdata'] = $Fields['XMLNODE_VALUE'];
         }
@@ -247,4 +250,3 @@ class DynaFormField extends DBTable
         return ($res->count() == 0);
     }
 }
- 
\ No newline at end of file
diff --git a/workflow/engine/methods/setup/main_init.php b/workflow/engine/methods/setup/main_init.php
index 4ea5e5100..b89c786a2 100755
--- a/workflow/engine/methods/setup/main_init.php
+++ b/workflow/engine/methods/setup/main_init.php
@@ -59,6 +59,7 @@ $tabItems = array ();
 $i = 0;
 
 foreach ($menuTypes as $menuType) {
+    $tabItems[$i] = new stdclass();
     $tabItems[$i]->id = $menuType;
     $LABEL_TRANSLATION = G::LoadTranslation( "ID_" . strtoupper( $menuType ) );
 
diff --git a/workflow/engine/methods/tasks/tasks_Ajax.php b/workflow/engine/methods/tasks/tasks_Ajax.php
index adfb5856c..fd90b99e4 100755
--- a/workflow/engine/methods/tasks/tasks_Ajax.php
+++ b/workflow/engine/methods/tasks/tasks_Ajax.php
@@ -64,6 +64,9 @@ try {
             }
 
             //Validating TAS_ASSIGN_VARIABLE value
+            if (!isset($aData['TAS_ASSIGN_TYPE'])) {
+                $aData['TAS_ASSIGN_TYPE'] = 'BALANCED';
+            }
             if ($aData['TAS_ASSIGN_TYPE'] == 'SELF_SERVICE_EVALUATE') {
                 $aData['TAS_ASSIGN_TYPE'] = 'SELF_SERVICE';
             } else {