How To Fix /SAPAPO/ATP399 - Function code &1 is not supported

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/ATP -

• Message number: 399

• Message text: Function code &1 is not supported

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/ATP399 - Function code &1 is not supported ?

  The SAP error message /SAPAPO/ATP399 Function code &1 is not supported typically occurs in the context of Advanced Planning and Optimization (APO) when a function code that is not recognized or supported by the system is called. This can happen in various scenarios, such as during the execution of a planning run, when calling a function module, or when using certain transactions.
  Causes:
  
  Unsupported Function Code: The function code being called is not implemented in the system or is not valid for the current context.
  Configuration Issues: There may be configuration settings that are not properly set up, leading to the system not recognizing the function code.
  Version Mismatch: The function code may be valid in a different version of SAP APO, and you might be using an older version that does not support it.
  Custom Development: If there are custom developments or enhancements, they might be calling a function code that is not supported or incorrectly implemented.
  
  Solutions:
  
  Check Function Code: Verify the function code being used. Ensure that it is valid and supported in your version of SAP APO.
  Review Configuration: Check the configuration settings in the APO system to ensure that all necessary settings are correctly configured.
  Update System: If you are using an older version of SAP APO, consider updating to a newer version that supports the required function codes.
  Debugging: If you have access to the development environment, you can debug the code to see where the unsupported function code is being called and why.
  Consult Documentation: Refer to SAP documentation or notes related to the specific function code to understand its usage and any prerequisites.
  Contact SAP Support: If the issue persists, consider reaching out to SAP support for assistance, especially if it involves standard SAP functionality.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error message or provide guidance on supported function codes.
  Transaction Codes: Familiarize yourself with transaction codes related to APO and ATP (Available to Promise) processes, as they may provide insights into the configuration and usage of function codes.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to identify the cause of the error and implement a suitable solution.