Diagnosis
When you attempted to lock the transaction data to be processed, aninternal error was established in the SAP lock management.

System Response
The SAP system cannot enter the requested lock correctly in the locktable of the enqueue server
. Therefore, the enqueue function module triggers an appropriate ex
ception. If this exception is not intercepted and dealt with, thisautomatically leads to the termination of the current transaction.

Procedure
The most common reason for this error message is that the enqueue servercan no longer be accessed. The cause of this can be that either theenqueue server itself or the message server, which creates theconnection between the application server and enqueue server in adecentral system configuration, is no longer available.