How To Fix PSSC_TOOLS151 - Enqueue error; internal error from enqueue server

SAP Error Message - Details

• Message type: E = Error

• Message class: PSSC_TOOLS - Message Class for Periods & Due Date Tools

• Message number: 151

• Message text: Enqueue error; internal error from enqueue server

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message PSSC_TOOLS151 - Enqueue error; internal error from enqueue server ?

  The SAP error message PSSC_TOOLS151 indicates an enqueue error, which typically occurs when there is an issue with the enqueue server in the SAP system. This error can arise due to various reasons, including:
  Causes:
  
  Lock Table Overflow: The enqueue server may have reached its maximum capacity for locks, leading to an inability to acquire new locks.
  Network Issues: Communication problems between the application server and the enqueue server can cause this error.
  Configuration Issues: Incorrect configuration settings for the enqueue server or the SAP system can lead to this error.
  Database Issues: Problems with the underlying database can also affect the enqueue mechanism.
  System Resource Limitations: Insufficient system resources (CPU, memory) can lead to performance issues with the enqueue server.
  
  Solutions:
  
  Check Lock Table Size: Increase the size of the lock table in the SAP system configuration if it is full. This can be done by adjusting the parameter enque/table_size in the instance profile.
  Restart Enqueue Server: Sometimes, simply restarting the enqueue server can resolve transient issues. This can be done through the SAP Management Console (SAP MC) or by restarting the application server.
  Check Network Connectivity: Ensure that there are no network issues affecting communication between the application server and the enqueue server.
  Review System Logs: Check the system logs (transaction SM21) and enqueue logs (transaction SM12) for any additional error messages or warnings that could provide more context.
  Monitor System Resources: Use transaction ST06 or ST02 to monitor system performance and resource usage. If resources are low, consider optimizing or upgrading the hardware.
  Check Configuration: Review the configuration settings for the enqueue server and ensure they are set correctly. This includes checking the instance profile parameters related to the enqueue server.
  Database Health Check: Perform a health check on the database to ensure it is functioning correctly and not causing issues with the enqueue server.
  
  Related Information:
  
  Transaction Codes:
  
  SM12: To view and manage locks.
  SM21: To check system logs for errors.
  ST06: To monitor system performance.
  ST02: To analyze buffer performance.
  
  
  SAP Notes: Check SAP Notes related to enqueue errors for specific patches or updates that may address known issues.
  Documentation: Refer to SAP Help documentation for detailed information on enqueue server configuration and troubleshooting.
  
  If the issue persists after trying the above solutions, it may be necessary to contact SAP support for further assistance.