I'm currently trying to insert/update customer master data from an external LS. Since I only have the KNA1 Data in the external system R/3 tells me I'd have to insert a bank country for the customer when it receives the IDoc. I already tried to set the MSGFN for E1KNBKM to 018 and 023 so the segment would be ignored but it doesn't seem to have any effect. I still can't insert the IDoc.
I would appreciate any suggestions on what might be worth to try.