'Copy Paste' not working anymore!

the copy and paste function in rhino for mac isnt working anymore…
need to work with it right now and cant draw every single line again and again…can you help please? do you know that problem?

thanks so much!

Copy/Paste (main menu, sub-menu edit) works ok when you copy objects from one design to another.
Use the “Copy” command when you want to copy objects within a design.

Copying a polyline and then pasting the polyline back into the same model places it exactly on top of the polyline you copied. Click and drag the second polyline you created to a new location.