Try to do this:
1. Cretae DB Filed_A: A/R reverse invoice:Cardcode
2. Hide Filed_A.
3. Create the DB field from OCRD (e.g. Business Partner: Cardname) and 'Relate to' Field_A in Content tab.
Try to do this:
1. Cretae DB Filed_A: A/R reverse invoice:Cardcode
2. Hide Filed_A.
3. Create the DB field from OCRD (e.g. Business Partner: Cardname) and 'Relate to' Field_A in Content tab.