Issue with Payment Run (FPY1)

Hi Gurus, need you help. I am getting the following message when executing the FPY1. Exceptions        1 Message no. MASSACT101 Diagnosis Counter Exceptions has value        1. For a more precise description of counter Click Here. Counter in Payment Program: Items with Exception Indicator Definition Number of items that cannot be paid and that have been placed in the list of payment exceptions. Each payment exception is classified using the item indicator (data element POKEN_PAY). For each item indicator, you can define whether these exceptions are to be included in the clarification worklist of the payment run.