Message type: E = Error
Message class: CK - Product Costing Messages
Message number: 491
Message text: Material master locked by user &
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CK491
- Material master locked by user & ?The SAP error message CK491 indicates that a material master record is locked by a user, preventing other users from making changes to that record. This typically occurs when a user is currently editing the material master or if a previous session did not close properly, leaving the record in a locked state.
Cause: User Editing: The most common cause is that another user is currently editing the material master record. Session Timeout: If a user was editing the record and their session timed out or was terminated unexpectedly, the lock may not have been released. Background Jobs: Sometimes, background jobs that are processing material master data can also lock the record. System Errors: Occasionally, system errors or crashes can lead to locks not being released properly.
Solution: Check User Lock: Use transaction code SM12 to check for locks on the material master. You can filter by the material number or the user ID to see who
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