SYSTEM_SHM_CHANGE_LOCK_ACTIVE SAP ABAP Runtime Error system shm change lock active

SYSTEM_SHM_CHANGE_LOCK_ACTIVE is an ABAP runtime error which you may come across when using or developing within an SAP system. See below for the standard details explaining what it means and how you can avoid or fix this runtime error.

Short Dump Classification: A - ABAP Programming Error

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SYSTEM_SHM_CHANGE_LOCK_ACTIVE ABAP Runtime Error

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There was a change lock active on a shared memory area. Please see abap error for more details about the possible cause of this runtime error and how it could be avoided.

A change lock was set on a shared objects memory area using ATTACH_FOR_WRITE() or ATTACH_FOR_UPDATE(). One of the following situations then arose:
1) The internal session was ended.
2) A SUBMIT, CALL TRANSACTION, or CALL DIALOG was called, and the change lock is in a transactional area.

Before one of the two situations described above could occur, either
A) the change lock must be explicitly released using DETACH_COMMIT() or DETACH_ROLLBACK() or
B) In the case of transactional area, a DETACH_COMMIT() is used to lift the change lock, which is confirmed with a database commit.

Either situation 1 or situation 2 occurred at the current position in the program, thus also violating condition <runtime parameter>.

The change lock was set on area instance <runtime parameter>. The internal object ID of the area handle is <runtime parameter> . A change lock set on a shared objects memory area has not been removed using DETACH_COMMIT() or DETACH_ROLLBACK(), or the database commit necessary for final release of the change lock is missing from the transactional area.