Hi Mirco, <br>
<br>
DocuWare uses VBA Syntax here. You might want to compare with nothing, or use the ISNULL() function. <br>
<br>
https://docs.microsoft.com/en-us/office/vba/language/reference/user-interface-help/isnull-function<br>
<br>
Hope this helps.<br>
Greetings from Germany,<br>
Simon H. Hellmann<br>
DocuWare System Consultant