Diagnosis
Backorder processing was calles up forplant&V1& with or without an invalid checking rule.

System Response
The system terminates processing for the current material. If you haveselected more than one material for plant &V1&, the system also ignoresthose, but issues no further message.

Procedure
Check the checking rule for backorder processing. You can find it inCustomizing for Sales, when setting the availability check.