/ISDFPS/OM_PROXY101 - Exactly-once request cannot be locked: &1 (error code: &2)

SAP Error Message - Details

• Message type: E = Error

• Message class: /ISDFPS/OM_PROXY -

• Message number: 101

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

Self-Explanatory Message

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AnswerBot

• What is the cause and solution for SAP error message /ISDFPS/OM_PROXY101 - Exactly-once request cannot be locked: &1 (error code: &2) ?

  The SAP error message /ISDFPS/OM_PROXY101 Exactly-once request cannot be locked: &1 (error code: &2) typically occurs in the context of the SAP Integrated Business Planning (IBP) or SAP S/4HANA environments, particularly when dealing with the processing of messages or requests that are expected to be handled exactly once.
  Cause:
  This error generally indicates that there is an issue with locking mechanisms in the system. Specifically, it suggests that the system is unable to lock a request that is supposed to be processed exactly once. The reasons for this could include:
  
  Concurrency Issues: Multiple processes are trying to access the same request simultaneously, leading to a locking conflict.
  Database Locking: The database may have a lock on the request due to another transaction that is currently being processed.
  Configuration Issues: There may be misconfigurations in the system that affect how requests are handled and locked.
  System Performance: High load on the system can lead to delays in acquiring locks, causing timeouts.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check for Concurrent Processes: Investigate if there are multiple processes trying to access the same request. If so, ensure that they are properly synchronized to avoid conflicts.
  
  
  Review Lock Entries: Use transaction codes like SM12 to check for existing lock entries in the system. If you find locks that are no longer needed, you may release them (with caution).
  
  
  Increase Timeout Settings: If the issue is related to timeouts, consider increasing the timeout settings for the relevant processes.
  
  
  System Performance Monitoring: Monitor the system performance to identify any bottlenecks that may be causing delays in processing requests.
  
  
  Configuration Review: Review the configuration settings related to message processing and locking mechanisms to ensure they are set up correctly.
  
  
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes or patches that may address this specific error.
  
  
  Contact SAP Support: If the issue persists after trying the above solutions, consider reaching out to SAP Support for further assistance.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like SM12 (for lock entries), SM21 (for system logs), and ST22 (for dumps) to help diagnose the issue.
  SAP Documentation: Review the official SAP documentation for the specific module you are working with (e.g., IBP, S/4HANA) for more insights on message processing and locking mechanisms.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed.
  
  By following these steps, you should be able to identify the root cause of the error and implement a suitable solution.