Diagnosis
It is not possible for the system to determine a unique postingprocedure for this document from the Customizing settings for theposting activity.
The system supports postings to customer, vendor and G/L accounts.However, due to the technical decoupling of the accounting system, it isnot possible for the system to post debit and credit items in onedocument.

System Response
The system cannot post the document.

Procedure
Contact your system administrator.

Procedure for System Administration
Change the account determination for the posting activity. For example,you can distribute the line items to several documents to ensure thatthey are unique.