When your printer throws a message canon printer in error state while print, it means there is something wrong in your Canon printer device. Maybe it has internal glitches which need to be eradicated sooner to resume the printing process. Check the connection established between both the devices your computer and printer. If connection issue is the reason for getting printer in error state, then fix the problem first and then start print anything. Using an outdated printer driver could also be the one factor for this error issue, so make sure the driver installed in your system is up-to-date.