When groups or types are removed from the project definition, some accounting information from those groups or types can remain in the VSAM data sets for that project. In order to avoid having records that are no longer useful in the VSAM data sets, you should use the DELGROUP service to remove the VSAM records for any groups or types that are being removed from the project definition. This step should be performed before the groups and types are removed from the project definition.

If groups or types have been previously removed from the project definition, you can create an alternate project definition that includes a definition for the removed groups and types. This project definition can be used with the DELGROUP service to delete any remaining VSAM records.