How To Fix FS862 - Function is not known in the external tax system (&)

SAP Error Message - Details

• Message type: E = Error

• Message class: FS - Messages from Tax Routines / Prenumbered Checks

• Message number: 862

• Message text: Function is not known in the external tax system (&)

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 FS862 - Function is not known in the external tax system (&) ?

  The SAP error message FS862, which states "Function is not known in the external tax system (&)," typically occurs when there is an issue with the integration between SAP and the external tax calculation system. This error can arise in various scenarios, particularly when the system is trying to call a function that is not recognized by the external tax system.
  Causes:
  
  Configuration Issues: The external tax system may not be properly configured in SAP, leading to the system not recognizing certain functions.
  Missing Functionality: The specific function being called may not be implemented or available in the external tax system.
  Version Mismatch: There may be a version mismatch between the SAP system and the external tax system, causing compatibility issues.
  Incorrect Function Call: The function name or parameters being passed may be incorrect or not supported by the external tax system.
  Network Issues: Connectivity problems between SAP and the external tax system can also lead to this error.
  
  Solutions:
  
  Check Configuration: Verify the configuration settings for the external tax system in SAP. Ensure that all necessary parameters and functions are correctly set up.
  Review Functionality: Consult the documentation of the external tax system to confirm that the function being called is supported and correctly implemented.
  Update Systems: Ensure that both the SAP system and the external tax system are updated to compatible versions. If necessary, apply patches or updates.
  Validate Function Calls: Review the code or configuration that is making the function call to ensure that it is correct and adheres to the expected format.
  Network Connectivity: Check the network connection between SAP and the external tax system to ensure that there are no issues preventing communication.
  Consult Logs: Look at the application logs in SAP (transaction SLG1) and the logs of the external tax system for more detailed error messages that can provide additional context.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to the FS862 error. SAP Notes often provide specific guidance for resolving known issues.
  Documentation: Review the documentation for both SAP and the external tax system for integration guidelines and troubleshooting steps.
  Support: If the issue persists, consider reaching out to SAP support or the support team for the external tax system for further assistance.
  
  By following these steps, you should be able to identify the root cause of the FS862 error and implement an appropriate solution.