To enable customer and supplier file maintenance:
Go to Housekeeping, Run Setup, User Defined and User Defined Field - Arcust.dbf
Tick the By User ID choose the user, click Mark All, and Exit.
Go to Housekeeping, Run Setup, User Defined, and User Defined Field - Apvend.dbf
Tick the By User ID, choose the user, click Mark All, and Exit.
Note: arcust for debtor and apvend for creditor.