Copy command

 From:  Ditto
4282.1 
I haven't found a "Stupid" thread where one can ask questions that are just too stupid and where the bug sits in front of the screen. So here I go:

How to use the copy command with manual input of the target point?

I tried entering 1 number for an ordinary distance, absolute coordinates, relative coordinates. Nothing works. Copy works if I use the mouse to designate the target point.

What am I doing wrong?