Diagnosis
You are attempting to generate cost collectors in the background. Anerror occurred during this process.
All selected settlement units have been checked, but no cost collectorswere generated or deleted.

System Response
The system only allows changes in the background when all checks aresuccessful.

Procedure
Look at the spool file for your job, which contains the errormessages.
Change the faulty settlement units online. If necessary, exclude faultysettlement units from background processing by using a variant.