Dear Experts,
Tricky question for you.
Triggering an external operation on a production order with a control key PP02, i need to create a purchase requisition with account assignment category = "U" (unknown), since the accounting (on project or on cost center) will be specified later, during the conversion from PR to Purchase Order accordingly to some buyer's guidelines.
Anyway, on transaction OPJP I'm not allowed to set AAC = U, I'm getting the error:
Acct assign. cat. "U" for purchase req. does not exist.
Message no. CS075
can anybody give me some hints?