How To Fix OPS_SE_PRS012 - Exactly-once request cannot be locked: &1 (error code &2)

SAP Error Message - Details

• Message type: E = Error

• Message class: OPS_SE_PRS - Project Management: Messages for Service Enabling

• Message number: 012

• Message text: Exactly-once request cannot be locked: &1 (error code &2)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message OPS_SE_PRS012 - Exactly-once request cannot be locked: &1 (error code &2) ?

  The SAP error message OPS_SE_PRS012, which states "Exactly-once request cannot be locked: &1 (error code &2)," typically occurs in the context of SAP's Process Integration (PI) or Process Orchestration (PO) when there is an issue with locking a request that is supposed to be processed exactly once. This error can arise due to various reasons, including concurrency issues, database locks, or configuration problems.
  Causes:
  
  Concurrency Issues: Multiple processes may be trying to access or modify the same request simultaneously, leading to a locking conflict.
  Database Locks: The request may be locked in the database due to a previous transaction that has not been completed or has failed.
  Configuration Issues: Incorrect configuration settings in the integration scenario or in the system landscape can lead to locking problems.
  System Performance: High load on the system can lead to delays in processing requests, causing timeouts and locking issues.
  
  Solutions:
  
  Check for Active Locks: Use transaction codes like SM12 to check for any active locks on the request. If you find locks that are no longer needed, you can release them.
  Review System Logs: Check the system logs (transaction SLG1) for any related error messages that might provide more context about the issue.
  Adjust Concurrency Settings: If applicable, review and adjust the concurrency settings in your integration scenario to prevent multiple processes from trying to access the same request simultaneously.
  Database Maintenance: Ensure that the database is properly maintained and that there are no long-running transactions that could be causing locks.
  Retry Mechanism: Implement a retry mechanism in your integration flow to handle transient locking issues gracefully.
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address this specific error or provide patches and updates.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SM12 (to view and manage locks), SLG1 (to view application logs), and SM21 (to check system logs).
  SAP Documentation: Review SAP documentation related to Process Integration and Process Orchestration for best practices on handling exactly-once processing and locking mechanisms.
  Performance Monitoring: Use tools like SAP Solution Manager to monitor system performance and identify bottlenecks that could lead to locking issues.
  
  If the problem persists after trying the above solutions, it may be necessary to engage SAP support for further assistance.