Message type: E = Error
Message class: CZ - Customizing messages
Message number: 091
Message text: Program & is already in use
This program is only available for one user at a time.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Please wait until the other user has finished working with the program.
Error message extract from SAP system. Copyright SAP SE.
CZ091
- Program & is already in use ?The SAP error message CZ091, which states "Program & is already in use," typically occurs when a user attempts to execute a program or transaction that is already being processed by another user or session. This is a common issue in SAP environments where multiple users may try to access the same program simultaneously.
Cause: Concurrent Execution: The program is already running in another session or by another user. Lock Mechanism: SAP uses a locking mechanism to prevent data inconsistencies. If a program is locked, other users cannot execute it until the lock is released. Long-Running Processes: If the program takes a long time to execute, it may remain locked for an extended period, causing other users to encounter this error.
Solution: Wait and Retry: If the program is currently being executed by another user, you may need to wait until it completes. You can try running the program again after some time. Check Active Sessions: Use
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