EasyFunction - Searcherror

Hello,

I created the following EasyFunction to get the first referencenumber from the Customer in the master item data UDF.

However, if I now search for an article with "*", I get the following error message:

"Error in command "SQLQuery": Element type not supported: Button"

Does anyone have an idea what this could be?

In addition, I have the question: When I call up the article and the UDF is filled, I have to update the article manually. Is it possible to update the article automatically via the EasyFunction?

Best regards and many thanks 
Levin