Hi I have Autocad 2009, I've produced a drawing with curved lines, but when I go into paper and press Z and (enter), the lines that are supposed to be curved, mess up, need help, I know there is a command to reset the lines back but I cant remember it, HELP!!!!!!!!!!

if they were OK in Modelspace, try try "regenall"

PURGE>AUDIT>REGENALL
Don't forget to SAVE!