Diagnosis
Before Release 4.51, account determination took place based on theposting reason. From Release 4.51, account determination has beenchanged over to main and sub-transactions. The use of main and sub-
transactions is active in this system (SAP Standard), and it is notpossible to specify a posting reason in addition to this. However, sometables still contain that field for compatibility purposes.

Procedure
The posting reason field must remain blank.