Message type: E = Error
Message class: COM_ALTER_IDENT - Messages for Alternative Identifiers
Message number: 018
Message text: Class of ID type & is already locked in a request
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The SAP error message COM_ALTER_IDENT018 indicates that a specific class of ID type is already locked in a request. This typically occurs when multiple users or processes are trying to modify the same object or class at the same time, leading to a conflict.
Cause: Concurrent Access: Another user or process is currently editing or has locked the object you are trying to modify. Long-running Transactions: A transaction that takes a long time to complete may hold a lock on the object, preventing others from accessing it. Transport Requests: If the object is part of a transport request that is currently being processed, it may be locked.
Solution: Check Lock Entries: Use transaction code SM12 to check for lock entries. You can see which user or process is holding the lock on the object. If it is safe to do so, you can delete the lock entry. Wait for Release: If the lock is held by another
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