How To Fix 00255 - Function code cannot be selected

00255 - Overview

• Message type: E = Error

• Message class: 00 -

• Message number: 255

• Message text: Function code cannot be selected

What causes this issue?

You entered an inactive function code.
You can trigger this by:
inputting directly in the OK code field<(>,<)>
inputting the fastpath of an inactive menu function<(>,<)>
choosing an inactive function key, or even by
choosing ENTER, if ENTER has an inactive function.
In batch input, a function code is included in field <NP>BDC_OKCODE</>
of the session, as long as this function code is not assigned to ENTER.
As well as activating function codes statically in the Menu Painter
(Transaction SE41), they can also be deactivated dynamically using the
<NP>EXCLUDING</> addition with statement <NP>SET PF-STATUS</>.

System Response

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

How to fix this error?

Error message extract from SAP system. Copyright SAP SE.

00255 - Details

• The SAP error message "00255 Function code cannot be selected" typically occurs when a user tries to execute a function or transaction that is not available or not permitted in the current context. This can happen for various reasons, including authorization issues, configuration settings, or system errors.
  Causes:
  
  Authorization Issues: The user may not have the necessary authorizations to execute the function code.
  Configuration Settings: The function code may not be configured correctly in the system or may not be available in the current transaction.
  Transaction Restrictions: Certain transactions may be restricted based on user roles or profiles.
  System Errors: There may be underlying system issues or bugs that prevent the function from being executed.
  
  Solutions:
  
  
  Check Authorizations:
  
  Verify that the user has the necessary authorizations to execute the function code. This can be done by checking the user's roles and profiles in the SAP system.
  Use transaction SU53 to analyze authorization failures after the error occurs.
  
  
  
  Review Configuration:
  
  Check the