SAP Message >W011 - Error when reading data for dunning of &1 &2 run &3 &4

Diagnosis
An error occurred when reading the open item for a dunning notice. Thedata is incomplete under certain circumstances.

System Response
The dunning notice was printed.

Procedure
Check the printed dunning notices for business partner &V1&, contractaccount &V2& from run &V3& &V4&.