Diagnosis
You have not made an entry in the Payment Method field.

System Response
No entry means a cash payment:
In Payroll, the Bank Transfer record is written to the table BT with theinitial payment method.
The preliminary data medium exchange program outputs a warning messagefor such a record and does not perform a bank transfer.

Procedure
Check whether cash payment is really to be used as the payment method.If necessary, change this to 'Bank Transfer'.
If the bank transfer information is not yet available, select the 'BankTransfer Information Missing' indicator. In Payroll, a credit is thencreated.