This isn't really a bug, you probably left a portion of coding out or something, but the Ctrl-Shift C hot key for copying map data doesn't actually do anything. You have to manually (god forbid

) go into the edit menu and click copy map data. The pasting hot key works just fine.
FIX IT OR ILL QUIT HACKING !!E&*!(#E@E!!IUDIUAUY!($@!)_!*$)!)_$! RAGE!!
That is all.