How To Fix MI542 - Pushbutton function code already exists (&)

MI542 - Overview

• Message type: E = Error

• Message class: MI - Customizing for the Material Master

• Message number: 542

• Message text: Pushbutton function code already exists (&)

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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MI542 - Details

• The SAP error message MI542, which states "Pushbutton function code already exists (&)," typically occurs when there is an attempt to create or define a pushbutton function code in a screen or transaction that already has a function code defined with the same identifier. This can happen in various SAP modules, particularly in custom development or when modifying standard screens.
  
  Cause:
  
  Duplicate Function Code: The primary cause of this error is that the function code you are trying to assign to a pushbutton already exists in the same context (e.g., screen, program).
  Custom Development: If you are working on a custom screen or transaction, it is possible that the function code was already defined elsewhere in the code.
  Screen Modifications: If you are modifying a standard SAP screen, the function code may already be in use by the standard functionality.
  
  
  Solution:
  
  
  Check Existing Function Codes: Review the existing function codes in the screen or program where