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An error occurred in the SAP lock management whilst trying to to lock an object by calling the ENQUEUE function module.
The SAP System is unable to enter the required locks in the lock tables managed in the ENQUEUE server. The ENQUEUE function module therefore triggers an exception. If this exception is not handled by the application program, the current transaction will be automatically terminated.
The most frequent reason for the error message is that you can no longer access the ENQUEUE server. The reason for this could be that either the ENQUEUE server itself or the message server that creates the link between the application server and the ENQUEUE server in a decentral system configuration is not running.
Contact the system administrator responsible. Execute the diagnosis function in the lock management to analyze the problem: Transaction SM12, Extras -> Diagnosis -> Diagnosis in update task.
With SAP's agreement you can use the extended diagnosis functions that are shown when you enter OK code "TEST".