How To Fix FS866 - Function module & does not exist; create

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 866

• Message text: Function module & does not exist; create

What causes this issue?

The function module mentioned does not exist. The system expects,
however, that it exists. The data for an external tax system is copied
into the transfer structure of this function module and the external
tax system called. The function module expected is NOT an SAP standard
one.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

The function module mentioned must be created. The requirement is that
the data transfer structure of the external tax system is defined in
the Data Dictionary.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message FS866 - Function module & does not exist; create ?

  The SAP error message FS866 indicates that a specific function module does not exist in the system. This error typically arises when a program or transaction attempts to call a function module that has not been created or is not available in the current SAP environment.
  Cause:
  
  Missing Function Module: The function module that is being called in the program does not exist in the SAP system.
  Incorrect Naming: There might be a typo or incorrect naming in the function module call.
  Transport Issues: The function module may exist in a different system (e.g., development) but has not been transported to the current system (e.g., quality or production).
  Authorization Issues: The user may not have the necessary authorizations to access the function module, leading to the perception that it does not exist.
  
  Solution:
  
  
  Check Function Module Existence:
  
  Use transaction code SE37 (Function Builder) to check if the function module exists. Enter the name of the function module and see if it is available.
  
  
  
  Create the Function Module:
  
  If the function module does not exist and you have the necessary permissions, you can create it using transaction SE37. Ensure that you follow the required specifications and coding standards.
  
  
  
  Correct the Call:
  
  If there is a typo or incorrect naming, correct the function module call in the ABAP code.
  
  
  
  Transport the Function Module:
  
  If the function module exists in another system, ensure that it is transported to the current system. This may involve working with your SAP Basis team to manage transports.
  
  
  
  Check Authorizations:
  
  Ensure that the user has the necessary authorizations to access the function module. This can be checked using transaction SU53 or by consulting with your security team.
  
  
  
  Consult Documentation:
  
  If the function module is part of a standard SAP package or enhancement, consult the relevant SAP documentation or notes for guidance.
  
  
  
  Related Information:
  
  Transaction Codes:
  
  SE37: Function Builder
  SE80: Object Navigator
  SE11: Data Dictionary
  SU53: Authorization Check
  
  
  SAP Notes: Check SAP Notes for any known issues or updates related to the specific function module or error message.
  Debugging: If you are unsure where the error is occurring, you can use the ABAP debugger to trace the execution and identify the point of failure.
  
  If you continue to face issues after following these steps, it may be beneficial to consult with your SAP support team or reach out to SAP support for further assistance.