How To Fix ARBFND_FRW420 - 551 Unable to forward request

SAP Error Message - Details

• Message type: E = Error

• Message class: ARBFND_FRW - Message class for package ARBFND_FRAMEWORK

• Message number: 420

• Message text: 551 Unable to forward request

Unable to forward request because of supplier misconfiguration. For
example, an intermediate hub failed to authenticate itself to a
supplier. Clients cannot rectify this error.
This issue was caused by a transient error. Please try to resend the
message later.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message ARBFND_FRW420 - 551 Unable to forward request ?

  The SAP error message ARBFND_FRW420 551, which states "Unable to forward request," typically occurs in the context of SAP's Application Interface Framework (AIF) or when dealing with asynchronous processing in SAP systems. This error can arise due to various reasons, including configuration issues, system performance problems, or data inconsistencies.
  Causes:
  
  Configuration Issues: Incorrect settings in the AIF or related components can lead to this error. This includes issues with the interface configuration, message types, or routing settings.
  System Performance: If the system is under heavy load or if there are performance bottlenecks, requests may fail to be processed or forwarded.
  Data Issues: Inconsistent or invalid data being processed can cause the forwarding mechanism to fail.
  Network Issues: Problems with network connectivity or communication between systems can also lead to this error.
  Authorization Issues: Lack of proper authorizations for the user or service account trying to forward the request.
  
  Solutions:
  
  Check Configuration: Review the AIF configuration settings to ensure that all parameters are correctly set up. This includes checking the interface definitions, message types, and routing rules.
  Monitor System Performance: Use transaction codes like ST22 (Dump Analysis), SM21 (System Log), and ST03N (Workload Analysis) to monitor system performance and identify any bottlenecks.
  Validate Data: Ensure that the data being processed is valid and meets the required criteria. You may need to implement data validation checks.
  Network Troubleshooting: Check network connectivity and ensure that there are no issues with firewalls or network configurations that could be blocking requests.
  Review Authorizations: Ensure that the user or service account has the necessary authorizations to perform the forwarding action. You can use transaction SU53 to analyze authorization issues.
  Check Logs: Review the application logs (transaction SLG1) for more detailed error messages that can provide insights into the root cause of the issue.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to AIF and the specific error message for any known issues or patches that may resolve the problem.
  Documentation: Refer to the official SAP documentation for AIF and related components for best practices and troubleshooting steps.
  Community Forums: Engage with SAP community forums or support channels for additional insights and solutions from other users who may have encountered similar issues.
  
  If the problem persists after trying the above solutions, it may be necessary to involve SAP support for further investigation.