&CAUSE&
A lock requested by calling an ENQUEUE function module cannot beconfigured because another SAP transaction is using the lock inquestion.

System Response
The ENQUEUE function module triggers a corresponding exception. If thisexception was not interrupted by the application program, this leadsautomatically to the active SAP transaction being cancelled.

Procedure
Look in the lock table to establish which user or transaction is usingthe requested lock (Tools -> Administration -> Monitor-> Lock entries). You may need to contact the user inquestion.