How To Fix RM166 - Run schedule header & is blocked by another user

SAP Error Message - Details

• Message type: E = Error

• Message class: RM - Messages for Repetitive Manufacturing

• Message number: 166

• Message text: Run schedule header & is blocked by another user

What causes this issue?

The run schedule header that you called up is currenty being processed
by another user. This is why it is blocked.

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?

Try to access the run schedule header again later.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RM166 - Run schedule header & is blocked by another user ?

  The SAP error message RM166 indicates that a run schedule header is blocked by another user. This typically occurs in the context of batch processing or scheduling jobs in SAP, where multiple users or processes may attempt to access or modify the same scheduling object simultaneously.
  Cause:
  
  Concurrent Access: Another user or process is currently accessing or modifying the run schedule header, leading to a lock on that object.
  Long-Running Processes: If a job or process is taking a long time to complete, it may hold the lock for an extended period, preventing other users from accessing it.
  System Configuration: Certain configurations or settings in the SAP system may lead to locking issues, especially in environments with high concurrency.
  
  Solution:
  
  Wait and Retry: The simplest solution is to wait for the other user or process to complete its operation. After a short period, try to access the run schedule header again.
  Identify the Lock: Use transaction code SM12 to check for locks in the system. You can identify which user or process is holding the lock on the run schedule header.
  
  In SM12, you can filter by the object name or user to find the relevant lock entries.
  
  
  Release the Lock: If you have the necessary authorizations and it is appropriate to do so, you can manually delete the lock entry in SM12. However, be cautious with this approach, as it may disrupt the other user's work.
  Check Job Status: Use transaction code SM37 to check the status of background jobs. If a job is stuck or running longer than expected, you may need to investigate further.
  Review System Configuration: If this issue occurs frequently, consider reviewing the system configuration and settings related to job scheduling and locking mechanisms.
  
  Related Information:
  
  Transaction Codes:
  
  SM12: To view and manage lock entries.
  SM37: To monitor background jobs and their statuses.
  SM21: To check system logs for any related errors or warnings.
  
  
  Documentation: Refer to SAP Help documentation for more details on job scheduling and locking mechanisms.
  User Communication: If you are in a collaborative environment, communicate with other users to coordinate access to shared resources.
  
  If the problem persists or if you encounter additional issues, it may be beneficial to consult with your SAP Basis team or technical support for further assistance.