Why aren't the lines copied into my system register?

Question

My copy of Vim has the +clipboard feature compiled in:

vim --version | grep clipboard
+clipboard       +job             +path_extra      +user_commands
+eval            +mouse_dec       +statusline      +xterm_clipboard

I'm trying to copy 1 and 2 lines into system clipboard with the command 1,2y"+.

When I check the + register with :reg +, I get the following output:

Why aren't the lines copied into my system register?

Answer 1

The problem is, " means start of a comment for :ex commands.

I think you actually want :1,2y + as this is the correct syntax for the :y command