How To Fix RFAC_QUICKFIX166 - Declare changing parameter '&1'

SAP Error Message - Details

• Message type: E = Error

• Message class: RFAC_QUICKFIX - Refactoring Messages

• Message number: 166

• Message text: Declare changing parameter '&1'

What causes this issue?

System Response

Creates a new changing parameter &V1& in method &V2&.

How to fix this error?

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

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RFAC_QUICKFIX166 - Declare changing parameter '&1' ?

  The SAP error message RFAC_QUICKFIX166, which states "Declare changing parameter '&1'", typically occurs in the context of ABAP programming when a method or function module is called without properly declaring the parameters that are expected to be changing.
  Cause:
  This error arises when:
  
  A method or function module is called with a parameter that is expected to be a changing parameter, but it is not declared as such in the calling program.
  The parameter is not defined correctly in the function module or method signature.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check the Function Module/Method Signature:
  
  Go to the function module or method definition in SE37 (for function modules) or SE80 (for classes and methods).
  Verify the parameters and ensure that the parameter in question is indeed defined as a changing parameter.
  
  
  
  Modify the Calling Program:
  
  In the program where the function module or method is called, ensure that the parameter is declared correctly.
  If the parameter is supposed to be changing, declare it as such in the calling program. For example:
  DATA: lv_param TYPE your_type.
  CALL FUNCTION 'YOUR_FUNCTION_MODULE'
    CHANGING
      param_name = lv_param.
  
  
  
  
  Check for Typographical Errors:
  
  Ensure that there are no typographical errors in the parameter names between the calling program and the function module/method definition.
  
  
  
  Review Documentation:
  
  If available, review the documentation for the function module or method to understand the expected parameters and their types.
  
  
  
  Test the Changes:
  
  After making the necessary changes, test the program to ensure that the error is resolved.
  
  
  
  Related Information:
  
  ABAP Documentation: Familiarize yourself with the ABAP documentation regarding parameter types (IMPORTING, EXPORTING, CHANGING) to understand how they work.
  Debugging: Use the debugger to step through the code and inspect the parameters being passed to identify any discrepancies.
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional context.
  
  By following these steps, you should be able to resolve the RFAC_QUICKFIX166 error and ensure that your ABAP code is functioning correctly.