How To Fix W0100 - RFC destination set but function module is empty

SAP Error Message - Details

• Message type: E = Error

• Message class: W0 - Customizing - ISR

• Message number: 100

• Message text: RFC destination set but function module is empty

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message W0100 - RFC destination set but function module is empty ?

  Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  W0100 RFC destination set but function module is empty
  
  Cause:
  This warning message occurs when an RFC (Remote Function Call) destination is specified in the function call, but the function module name itself is not provided or is empty.
  In other words, the system expects a function module name to be called remotely via the RFC destination, but the function module parameter is missing or blank.
  
  When does it occur?
  
  When calling an RFC-enabled function module programmatically (e.g., via CALL FUNCTION statement) and specifying the DESTINATION parameter, but the FUNCTION parameter (function module name) is empty.
  This can happen due to programming errors, incorrect variable assignments, or missing input data.
  
  
  Solution:
  
  
  Check the function module name:
  
  Ensure that the function module name passed in the CALL FUNCTION statement is not empty.
  Example:
  CALL FUNCTION lv_function_module
    DESTINATION lv_destination
    ...
  Here, lv_function_module must contain a valid function module name.
  
  
  
  
  Verify variable assignment:
  
  Check the variable or parameter that holds the function module name.
  Make sure it is properly assigned before the RFC call.
  
  
  
  Debug the program:
  
  Use the ABAP debugger to check the value of the function module name variable before the RFC call.
  Confirm that the function module name is correctly set.
  
  
  
  Check the RFC destination:
  
  Although the error is about the function module being empty, verify that the RFC destination is correctly configured and active in transaction SM59.
  
  
  
  Correct the program logic:
  
  If the function module name is dynamically determined, ensure the logic that sets it is correct and does not result in an empty string.
  
  
  
  
  Related Information:
  
  Transaction SM59: Used to maintain and test RFC destinations.
  Function Module Call Syntax:
  CALL FUNCTION 'FUNCTION_MODULE_NAME' DESTINATION 'RFC_DESTINATION'
    IMPORTING ...
    EXPORTING ...
    TABLES ...
    EXCEPTIONS ...
  
  Debugging Tips:
  
  Set breakpoints before the RFC call.
  Check the values of all parameters.
  
  
  SAP Notes:
  
  Sometimes, SAP Notes related to RFC or specific function modules might provide additional insights if this error occurs in standard SAP code.
  
  
  
  
  Summary:
  
  Error: RFC destination specified but function module name is empty.
  Cause: Missing or empty function module name in the RFC call.
  Fix: Ensure the function module name is correctly assigned and not empty before making the RFC call.
  
  
  If you provide the relevant code snippet or context, I can help you pinpoint the exact issue.