I recently had an incident with a roll-fed plotter. It's not printing. Message onscreen complains of incorrect paper size. Tell printer to print anyway. It st

I recently had an incident with a roll-fed plotter. It's not printing. Message onscreen complains of incorrect paper size. Tell printer to print anyway. It starts dumping the roll through, completely blank. Cancel just hangs. Power button does nothing. 10m of roll gone already. Fuck it, I'll just manually roll it backwards onto the roll. I pull the power plug. I plug it back in. First thing the plotter does is cut the paper off. Fuck. TL;DR: My nieces and nephews are not short of paper for drawing on.