System is trying to post exchange rate rounding revenues to a cost center!

Hello experts,

We are trying to clear some accounts payable items and also run the payment program. Both operations are trying to post revenue to a cost center (and profit center), and we get an error (because cost center is locked against revenues, and we want to keep it that way...).

We have implemented the New GL with document split. We have setup account 80600 for revenue exchange rate differences in configuration. We have setup in OKB9 account 80600 for exchange rate differences to be posted to a profit center. Account 80600 is defined as a revenue element (type 11).

Can anybody please explain why the system is deriving the cost center and profit center when trying to post the revenue, instead of just the profit center?

Eventually if I cannot solve this issue, can anybody tell me how to change a cost element category of a cost element (from 11 to 1) which already has transactions posted to?

Thank you for your help in advance!

Best regards,

Jose Eximeno