Diagnosis
You wish to have the system generate or change a purchase order for anadditional automatically. In order for this tobe possible, material document &V1&, to which the additionals documentis assigned, must be blocked. However, this document is currently beingprocessed.
No follow-on purchase order is generated, as processing the materialdocument could result in changes being made to the additionalsdocument.

System Response
The purchase order for the additional is not generated/changed.

Procedure
Try again later.