We are using the prepayment functionality and when we park the invoice (so that the prepayment document can be posted), there is an error message " bar code entry not active > Administration " (message no. OA280). The detail of the error states that the bar code entry has not been activated. The message has a link to the configuration screen OAC5, which allows activating bar code for objects such as RKPF. My question is why is the system even asking for the bar code to be activated in the first place? What makes the system ask for the bar code to be activated?