How To Fix RSCRT039 - Error writing RSCRT_DEMONS. Start of daemon &1 failed

SAP Error Message - Details

• Message type: E = Error

• Message class: RSCRT - Near-To-Real-Time Messages

• Message number: 039

• Message text: Error writing RSCRT_DEMONS. Start of daemon &1 failed

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 RSCRT039 - Error writing RSCRT_DEMONS. Start of daemon &1 failed ?

  The SAP error message RSCRT039 indicates that there is an issue with starting the SAP background processing daemon (RSCRT_DEMONS). This error can occur due to various reasons, and understanding the cause is essential for troubleshooting and resolving the issue.
  Causes of RSCRT039 Error
  
  
  Configuration Issues: The daemon may not be properly configured in the system. This could include incorrect parameters in the configuration files.
  
  
  Resource Limitations: The system may be running out of resources (e.g., memory, CPU, or disk space) that are required to start the daemon.
  
  
  Permission Issues: The user under which the SAP system is running may not have the necessary permissions to start the daemon.
  
  
  Network Issues: If the daemon requires network access, any network-related issues could prevent it from starting.
  
  
  Corrupted Files: The files related to the daemon may be corrupted or missing.
  
  
  System Lock: There may be a lock on the system that prevents the daemon from starting.
  
  
  Solutions to RSCRT039 Error
  
  
  Check Configuration:
  
  Review the configuration settings for the daemon in the SAP system. Ensure that all parameters are correctly set.
  
  
  
  Monitor System Resources:
  
  Check the system's resource usage (CPU, memory, disk space) to ensure that there are sufficient resources available. You can use tools like top, htop, or df on Unix/Linux systems to monitor resource usage.
  
  
  
  Verify Permissions:
  
  Ensure that the user running the SAP instance has the necessary permissions to start the daemon. Check the ownership and permissions of the relevant files and directories.
  
  
  
  Check Network Connectivity:
  
  If the daemon requires network access, ensure that there are no network issues. Test connectivity to any required services or databases.
  
  
  
  Review Logs:
  
  Check the SAP system logs (e.g., dev_w0, dev_rfc) for any additional error messages or warnings that could provide more context about the failure.
  
  
  
  Restart the SAP System:
  
  Sometimes, a simple restart of the SAP system can resolve transient issues that may be causing the daemon to fail.
  
  
  
  Check for Locks:
  
  Use transaction codes like SM12 to check for any locks that might be preventing the daemon from starting.
  
  
  
  Reinstall or Repair:
  
  If files related to the daemon are corrupted, consider reinstalling or repairing the relevant components.
  
  
  
  Related Information
  
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error. SAP Notes often contain patches or workarounds for known issues.
  
  
  SAP Community: The SAP Community forums can be a valuable resource for finding solutions to similar issues encountered by other users.
  
  
  Documentation: Review the official SAP documentation for background processing and daemon configuration for additional insights.
  
  
  If the issue persists after trying the above solutions, it may be necessary to contact SAP support for further assistance.