SAP Note 17798 - None or too little payment forms printed

Symptom:

Less payment forms ( checks, bank transfers, bills of exchange ) are printed than specified in the payment list. Alternative: payments are missing on the data carrier (disk).

Cause and prerequisites

The print reports, e.g. RFFOD__U RFFOD__S RFFOUS_C ) were planned with a variant, for which the payment document validation field is selected and the the print report was running before all payment documents were updated.
Typically, this problem occurs when print programs are planned in the payment run.

Solution
1. You do without the validation of the payment documents. But then you must make sure that really all payment documents were posted before sending the forms and data carriers. For this, refer to the specifications in the status display of the payment run:
Posting request created: NNN / completed MMM
2. You print with validation of the payment documents, but plan the printout seperately. Before planing, check via the status display (see above) that all documents have been posted.