Message type: E = Error
Message class:  CNV_DMC_WDA - Messages used in WDA UI 
Message number: 088
Message text: Migration object is locked by user &1
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The SAP error message CNV_DMC_WDA088 indicates that a migration object is currently locked by a specific user. This typically occurs during data migration processes, such as when using the SAP Data Migration Cockpit or other migration tools, and it prevents other users from accessing or modifying the same migration object until the lock is released.
Cause: User Lock: The migration object is locked by a user who is currently working on it. This can happen if a user has initiated a migration process and has not completed or released it. Session Timeout: If a user’s session times out or if they exit the application without properly releasing the lock, the object may remain locked. Concurrent Access: Multiple users trying to access the same migration object simultaneously can lead to locking issues.
Solution: Identify the Locking User: Check the error message for the user ID that is locking the migration object. You can use transaction SM12 to
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