SAP Message WM566 - Job & cannot be processed using this program

Diagnosis
You wish to perform an asynchronous listing. The listing cannot beperformed with this program, however, as this type of job cannot beprocessed with this program.

System Response
The listing program is terminated.

Procedure
If the job is an assignment of a plant to a reference plant or to anassortment, you need to start program RWSORT61.
If the job is an assignment of materials, seasonal materials ormaterial groups to an assortment, you need to start program RWSORT65.