How To Fix AV451 - ***** End CPIC reservation

SAP Error Message - Details

• Message type: E = Error

• Message class: AV - Decentral Order Control DASS

• Message number: 451

• Message text: ***** End CPIC reservation

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 AV451 - ***** End CPIC reservation ?

  The SAP error message AV451, which states "End CPIC reservation," typically occurs in the context of communication between SAP systems or between an SAP system and an external system. This error is related to the Common Programming Interface Communication (CPIC), which is used for communication between different SAP systems or between SAP and non-SAP systems.
  Causes of AV451 Error
  
  Network Issues: Problems with the network connection can lead to communication failures, resulting in the CPIC reservation being terminated.
  Resource Limitations: If the SAP system is running out of resources (like memory or CPU), it may not be able to maintain the CPIC connection.
  Timeouts: If a CPIC connection takes too long to respond, it may time out, leading to this error.
  Configuration Issues: Incorrect configuration settings in the SAP system or in the external system can lead to communication problems.
  System Load: High load on the SAP system can cause delays in processing requests, leading to CPIC errors.
  
  Solutions to AV451 Error
  
  Check Network Connectivity: Ensure that there are no network issues between the systems involved. You can use tools like ping or traceroute to diagnose network problems.
  Monitor System Resources: Check the SAP system's resource usage (CPU, memory, etc.) to ensure it is not overloaded. You can use transaction codes like SM50 or SM66 to monitor active processes.
  Increase Timeout Settings: If timeouts are causing the issue, consider increasing the timeout settings in the SAP system or the external system.
  Review Configuration: Verify the configuration settings for the CPIC connections in both the SAP system and the external system. Ensure that all parameters are set correctly.
  Check SAP Notes: Look for any relevant SAP Notes that might address this specific error. SAP frequently releases updates and patches that can resolve known issues.
  Restart the SAP System: If the issue persists, consider restarting the SAP system to clear any temporary issues that may be affecting communication.
  
  Related Information
  
  Transaction Codes: Use transaction codes like SM21 (System Log) and ST22 (Dump Analysis) to check for any related errors or dumps that might provide more context about the issue.
  SAP Support: If the problem continues after trying the above solutions, consider reaching out to SAP Support for further assistance. They can provide more specific guidance based on your system configuration and logs.
  Documentation: Review the official SAP documentation for CPIC and related communication protocols for more detailed information on configuration and troubleshooting.
  
  By following these steps, you should be able to diagnose and resolve the AV451 error in your SAP environment.