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

FS866 - Overview

• 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