How To Fix EC144 - Unable to overwrite system functions

EC144 - Overview

• Message type: E = Error

• Message class: EC - Development environment: Menu Painter

• Message number: 144

• Message text: Unable to overwrite system functions

What causes this issue?

You attempted to assign a function to a function key that is reserved
for a system function (e.g. F1, F4, F10). This is not allowed.

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?

Assign the function to a freely definable function key.
Since system functions are dependent on the status type, you may need
to change the status type. To do this, select <LS>Goto -> Attributes ->
F key setting...</> .

Error message extract from SAP system. Copyright SAP SE.

EC144 - Details

• The SAP error message EC144 "Unable to overwrite system functions" typically occurs when there is an attempt to modify or overwrite standard SAP functions or objects that are protected by the system. This can happen in various scenarios, such as when trying to create or modify a function module, transaction, or other objects that are part of the SAP standard.
  Causes:
  
  Modification of Standard Objects: Attempting to change standard SAP function modules or programs that are not meant to be modified.
  Authorization Issues: Lack of proper authorizations to make changes to certain objects in the SAP system.
  Transport Layer Restrictions: The system may have restrictions in place that prevent overwriting standard functions.
  Development Class Restrictions: The object may belong to a development class that does not allow modifications to standard objects.
  
  Solutions:
  
  Use of Customer Exits or BAdIs: Instead of modifying standard functions, consider using customer exits or Business Add-Ins (BAdIs) to implement custom logic without changing