How To Fix WER160 - Class method and method call signature do not match

SAP Error Message - Details

• Message type: E = Error

• Message class: WER - Messages for the package WER

• Message number: 160

• Message text: Class method and method call signature do not match

Self-Explanatory Message

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• What is the cause and solution for SAP error message WER160 - Class method and method call signature do not match ?

  The SAP error message WER160: Class method and method call signature do not match occurs when there is a mismatch between the method definition in a class and the way the method is called in the ABAP code.
  
  Cause
  
  The method signature (parameters, parameter types, or parameter passing modes) defined in the class does not match the way the method is called.
  This can happen if:
  
  The number of parameters in the method call differs from the method definition.
  The types of parameters passed do not match the method’s parameter types.
  The parameter passing mode (IMPORTING, EXPORTING, CHANGING, or RETURNING) is not respected.
  The method is called with parameters in the wrong order.
  The method is called as a function module or procedure with a different signature.
  
  
  Sometimes, this error occurs after changes in the class method signature without adjusting all the calls to that method.
  
  
  Solution
  
  
  Check the method definition:
  
  Go to the class in SE24.
  Open the method in question.
  Review the parameter list: number, types, and passing modes.
  
  
  
  Check the method call:
  
  Find the place(s) in the code where the method is called.
  Verify that the parameters passed match the method signature exactly.
  Ensure the order and types of parameters are correct.
  Make sure the method call respects the parameter passing modes.
  
  
  
  Adjust the method call or method definition:
  
  If the method signature was changed intentionally, update all calls accordingly.
  If the method call is incorrect, fix the call to match the method signature.
  
  
  
  Recompile and test:
  
  After corrections, activate the class and the calling programs.
  Test to ensure the error is resolved.
  
  
  
  
  Related Information
  
  Transaction SE24: Class Builder to check and edit class methods.
  Transaction SE80: Object Navigator to find class and method calls.
  ABAP Documentation: For method parameter passing modes and syntax.
  Common scenarios:
  
  Changing a method from IMPORTING to CHANGING or vice versa.
  Adding or removing parameters in a method.
  Using a method with a RETURNING parameter but calling it without handling the return value.
  
  
  
  
  Example
  Method definition:
  METHODS my_method
    IMPORTING
      iv_param TYPE i
    EXPORTING
      ev_result TYPE i.
  Correct call:
  DATA lv_result TYPE i.
  CALL METHOD my_object->my_method
    EXPORTING
      iv_param = 10
    IMPORTING
      ev_result = lv_result.
  Incorrect call (causes WER160):
  CALL METHOD my_object->my_method
    EXPORTING
      iv_param = 10.
  (Missing the IMPORTING parameter ev_result)
  
  If you provide the exact method signature and the call statement, I can help you pinpoint the mismatch.