How To Fix IU629 - Could not save selected maximum number of background processes

SAP Error Message - Details

• Message type: E = Error

• Message class: IU - Incremental Conversion (ICNV)

• Message number: 629

• Message text: Could not save selected maximum number of background processes

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message IU629 - Could not save selected maximum number of background processes ?

  The SAP error message IU629, which states "Could not save selected maximum number of background processes," typically occurs when there is an issue with the configuration of background processing in the SAP system. This error can arise due to various reasons, including system settings, user authorizations, or configuration limits.
  Causes:
  
  Configuration Limits: The maximum number of background processes may be set to a value that exceeds the system's capacity or is not allowed by the configuration.
  Authorization Issues: The user attempting to make changes may not have the necessary authorizations to modify background processing settings.
  System Parameters: The parameters related to background processing (like rdisp/wp_no_btc) may not be set correctly in the instance profile.
  Technical Issues: There may be underlying technical issues with the SAP system that prevent saving changes.
  
  Solutions:
  
  
  Check Configuration Settings:
  
  Go to transaction RZ10 to check the instance profile settings.
  Look for the parameter rdisp/wp_no_btc and ensure it is set to an appropriate value that does not exceed the system's capabilities.
  
  
  
  User Authorizations:
  
  Ensure that the user has the necessary authorizations to change background processing settings. This may require checking roles and authorizations in transaction PFCG.
  
  
  
  Adjust Maximum Background Processes:
  
  If the maximum number of background processes is set too high, reduce it to a more manageable number that aligns with your system's resources.
  
  
  
  Check System Logs:
  
  Review system logs (transaction SM21) for any related errors or warnings that might provide additional context for the issue.
  
  
  
  Restart the Instance:
  
  In some cases, restarting the SAP instance may resolve temporary issues that are preventing changes from being saved.
  
  
  
  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.
  
  
  
  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: 
  
  RZ10: Profile maintenance
  SM21: System log
  PFCG: Role maintenance
  
  
  SAP Documentation: Refer to the official SAP documentation for background processing and system configuration for more detailed guidance.
  System Performance: Keep in mind that increasing the number of background processes can impact system performance, so adjustments should be made carefully based on system capacity and workload.
  
  By following these steps, you should be able to diagnose and resolve the IU629 error in your SAP system.