Diagnosis
Material groups are defined for this assortment in the material groupassortment owner master. However, it is specified in the communicationprofile of this assortment that only those materials which are allowedin the material group assortment master are allowed in this assortment.(This means that there is no entry in the "Sales allowed in allmaterial groups" field.)

Procedure
Expand the material group assortment master or cancel listing of thesematerials in this assortment or use another communication profile forthe assortment.