How To Fix APOC_OR_MESSAGES371 - Could not lock all output request items.

SAP Error Message - Details

• Message type: E = Error

• Message class: APOC_OR_MESSAGES - Messages for Output Control

• Message number: 371

• Message text: Could not lock all output request items.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message APOC_OR_MESSAGES371 - Could not lock all output request items. ?

  The SAP error message APOC_OR_MESSAGES371 ("Could not lock all output request items") typically occurs in the context of SAP Advanced Planning and Optimization (APO) when there is an issue with locking the output request items during processing. This can happen in various scenarios, such as during the execution of a planning run, when trying to release a production order, or when processing a transport request.
  Causes:
  
  Concurrency Issues: Multiple users or processes may be trying to access or modify the same output request items simultaneously, leading to a locking conflict.
  Long-Running Transactions: If a transaction is taking too long to complete, it may hold locks longer than expected, causing other transactions to fail when they attempt to acquire the same locks.
  Database Lock Table Issues: The database lock table may be full or not functioning correctly, preventing new locks from being acquired.
  Configuration Issues: Incorrect configuration in the APO system or related settings may lead to locking problems.
  
  Solutions:
  
  Check for Active Sessions: Use transaction codes like SM12 to check for active locks. If you find any unnecessary locks, you can delete them if you have the necessary authorizations.
  Review Long-Running Transactions: Identify any long-running transactions that may be holding locks and investigate why they are taking longer than expected. Optimize these transactions if possible.
  Increase Lock Table Size: If the lock table is full, consider increasing its size. This can be done by adjusting the relevant parameters in the SAP system configuration.
  Retry the Operation: Sometimes, simply retrying the operation after a short wait can resolve the issue, especially if it was caused by a temporary locking conflict.
  Check System Logs: Review system logs (transaction SLG1) for any additional error messages or warnings that may provide more context about the issue.
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error message or provide additional troubleshooting steps.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like SM12 (to view and manage locks), SM21 (to view system logs), and SLG1 (to view application logs).
  SAP Support: If the issue persists, consider reaching out to SAP Support for assistance, especially if it is impacting business operations.
  Documentation: Review the official SAP documentation for APO and related modules to understand the locking mechanisms and best practices for avoiding locking issues.
  
  By following these steps, you should be able to diagnose and resolve the issue related to the error message APOC_OR_MESSAGES371.