Diagnosis
In the current transaction you are attempting to edit an assortmentthat was created in the transaction for maintaining plants. The numberof changes that can be carried out in this transaction is limited,however.
You can only assign customers (in their role as assortment users) tothe assortment.
If you wish to maintain basic data or assign texts and material groupsto the assortment, you must use the transaction for maintaining plants.

System Response
INCLUDE ISR_STOP

Procedure
Maintain the assortment in the transaction for maintaining plants.