SAP Message WU226 - Automatic module generation determined -> manual creation not possible

Diagnosis
At least one subsequent processing step was successfully carried outand saved for this promotion. The system determined that modules andplant group assignments are to be generated automatically. They aregenerated via Listing. Other subsequent processing functions onlydetermine the modules and plant group assignments. This is necessary sothat plant-to-material assignments are the same for all follow-onprocessing functions.

System Response
Manual modules can no longer be created.