SAP Message 5U257 - Posting run number & is not last in T51R2.

Diagnosis
For posting run &V1& acknowledgement runs already exist.

System Response
Posting run number &V1& could not be removed.

Procedure
Please cancel posting runs successively starting from the latest run.This needs to be done due to the fact that 3PR posting runs can havereevaluated due dates that do not correspond to the original due dates.To keep the remittance items consistant a step by step cancelation ofthe records needs to be performed.