Hi. I am hooking a node form. The content type has a cck node reference field, and the form has a text field to select the node. In some cases, the user should not be allowed to select...the value should be forced. So I decide which field name to use based on the content type, and then change the text field to a hidden field like this: $form[$var] = array( '#type' => 'hidden', '#value' => $nid, ); The form comes up just fine. The problem is, when it is submitted, I receive: *Fatal error*: Cannot unset string offsets in *sites\all\modules\cck\content.module* on line *1248*