Add search criteria to inquiry screen

SOLVED

Hi there,

I successfully added the "internal reference" field from the purchase order to the "Order lines inquiry" screen. Now we want to add the field to the filter.

I already added and "linked" the header and cirteria fields in the "CPP" inquiry:

Unfortunately it seems that this would not add the field to the whole filter criteria? Maybe it requires to add this criteria to a specific script? How could we solve this? Any ideas?

Thanks!