Diagnosis
You want to work on a BOM using change number &V1&. One of thefollowing situations triggered this error message:
You are rocessing the change master in another session.
The change master is currently being processed by user &V2&.
The change master has just been processed by user &V2&, by the systemhas not posted it yet.

Procedure
Try again to process the BOM with this change number later.
If the BOM is locked over a long period of time, ask the appropriateuser why it is locked.