How To Fix CZ091 - Program & is already in use

SAP Error Message - Details

• Message type: E = Error

• Message class: CZ - Customizing messages

• Message number: 091

• Message text: Program & is already in use

What causes this issue?

This program is only available for one user at a time.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Please wait until the other user has finished working with the program.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 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 transaction code SM50 (or SM66 for global monitoring) to check for active processes. You can see if the program is running and who is executing it.
  Terminate the Process: If you have the necessary authorizations and determine that the process is stuck or should not be running, you can terminate it from the SM50 transaction. Be cautious with this approach, as it may lead to data inconsistencies.
  Contact the User: If you identify the user who is running the program, you can reach out to them to see if they can complete their task or if they are facing issues.
  Review Program Logic: If this error occurs frequently, it may be worth reviewing the program's logic to see if it can be optimized to reduce execution time or to handle concurrent executions more gracefully.
  
  Related Information:
  
  Transaction Codes: 
  
  SM50: Monitor active processes.
  SM66: Monitor global processes.
  SM21: Check system logs for any related errors or warnings.
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to the specific program or transaction you are trying to execute.
  User Authorizations: Ensure that users have the appropriate authorizations to execute the program, as sometimes authorization issues can lead to unexpected behavior.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP Basis team or SAP support for further assistance.