I had an Internal Order, when I settle IO to Cost Center. I got 2 messages :
1. GL Account XXX Required Assignment to a CO Object.
2. GL Account XXX does not allow to post to Cost Center
I guess two message come from validation. I check OB28 and try with simulate function. I found nothing 😔, 7 rule false and 2 rule true-true --> it's mean no error.
I don't know why. Could you please help to explain why system pop up error message ?