This is a non-function

What causes this issue?

Depending on the context of this message:
The requested function is not implemented and therefore raises the
non-function message.
The screen that you have just entered is not relevant in the current
context.

System Response

Nothing has been done, and nothing can be done.
It was not possible to influence the user interface element or operating
sequence which brought you here in advance, so we can only inform you
that you reached a dead end.

How to fix this error?

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

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.