How To Fix WXP034 - Function code &1 cannot be defined

SAP Error Message - Details

• Message type: E = Error

• Message class: WXP - Retail Planning

• Message number: 034

• Message text: Function code &1 cannot be defined

Self-Explanatory Message

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• What is the cause and solution for SAP error message WXP034 - Function code &1 cannot be defined ?

  SAP Error Message:
  
  WXP034 Function code &1 cannot be defined
  
  Cause:
  This error occurs when you try to define or assign a function code in a GUI status (menu or toolbar) that is not allowed or is already reserved by the system. Function codes are identifiers used in SAP GUI to trigger specific actions when a user interacts with menu items, buttons, or function keys.
  Common reasons for this error include:
  
  Attempting to define a function code that is reserved by SAP and cannot be redefined.
  Using an invalid or incorrect function code format.
  Trying to assign a function code that conflicts with existing function codes in the same GUI status.
  Defining a function code in a GUI status where it is not permitted (e.g., system function codes).
  
  
  Solution:
  To resolve the error WXP034, follow these steps:
  
  
  Check the Function Code:
  
  Verify that the function code you are trying to define is valid and not reserved by SAP.
  Function codes typically follow a naming convention (e.g., 2-4 characters, uppercase letters and numbers).
  
  
  
  Avoid Reserved Function Codes:
  
  SAP reserves certain function codes for system use (e.g., BACK, EXIT, CANCEL, SAVE, ENTER).
  Do not redefine or assign these reserved codes in your custom GUI status.
  
  
  
  Check for Duplicates:
  
  Ensure the function code is not already used in the same GUI status or in conflicting contexts.
  Use transaction SE41 (Menu Painter) or SE80 to check existing function codes in the GUI status.
  
  
  
  Use Correct GUI Status:
  
  Make sure you are defining the function code in the correct GUI status.
  Some function codes are only valid in certain GUI statuses.
  
  
  
  Adjust or Rename Function Code:
  
  If the function code is invalid or reserved, choose a different, unique function code.
  Follow SAP naming conventions and avoid special characters.
  
  
  
  Transport and Activate:
  
  After correcting the function code, save and activate the GUI status.
  Transport the changes if necessary.
  
  
  
  
  Related Information:
  
  Transaction SE41 (Menu Painter): Used to create and modify GUI statuses, menus, and function codes.
  Function Codes: Used in ABAP programs to identify user actions triggered by menu items or buttons.
  Reserved Function Codes: SAP reserves certain function codes for standard actions; these should not be redefined.
  SAP Help and Documentation: Refer to SAP Library or online help for guidelines on function codes and GUI status design.
  Error Message Class: WXP (related to GUI status and menu painter).
  
  
  Summary:
  The error WXP034 Function code &1 cannot be defined indicates an invalid or reserved function code assignment in a GUI status. To fix it, verify the function code is valid, unique, and not reserved by SAP, then redefine or rename it accordingly in the Menu Painter (SE41).
  
  If you need further assistance, please provide the function code you are trying to define and the context (transaction, GUI status) where the error occurs.