SAP Message /DSD/SL021 - Data update of the settlement document header failed

Diagnosis
Updating the settlement document header data has failed because atleast one data record that should be updated, does not exist in thedatabase.
The application that started the call decides to prematurely terminateprocessing in this case.

System Response
Processing is preamaturely terminated.

Procedure
Inform your system administrator,

Procedure for System Administration
Note: The situation was probably caused by an application error.