How To Fix EC144 - Unable to overwrite system functions

SAP Error Message - Details

• 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.

Smart SAP Assistant

• What is the cause and solution for SAP error message EC144 - Unable to overwrite system functions ?

  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 the standard code.
  Create Z-Objects: If you need to create custom functionality, create Z-objects (custom objects) instead of modifying standard ones.
  Check Authorizations: Ensure that you have the necessary authorizations to make changes. Consult with your SAP security team if needed.
  Review Development Guidelines: Follow SAP's guidelines for development and modification. Avoid direct changes to standard objects.
  Consult SAP Notes: Check for any relevant SAP Notes that may address this issue or provide guidance on best practices.
  
  Related Information:
  
  SAP Notes: Search for SAP Notes related to EC144 for specific guidance or patches that may address the issue.
  SAP Community: Engage with the SAP Community forums to see if others have encountered and resolved similar issues.
  Documentation: Review SAP documentation regarding enhancements, modifications, and best practices for custom development.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP Basis or development team for further assistance.