What's wrong with my Epson 9900?

[RobinFaichney]

My ESP9900 just produced this horrible mess (attached). I initially cancelled the job when I saw the image was too small, and I don't yet know the reason for that, but I'm guessing it's independent of whatever's causing these scrapes and smears. The paper is a 315gsm matte A2 and the image is of surf, or rather of a pastel drawing of surf, and it's mostly blue and white with a little green, in case it's not immediately obvious what doesn't belong to it. Immediately prior to this two A3 prints were successfully made on the same paper. I guess I'll likely have to call support but in the meantime should I try again or might that risk causing (more) damage?

[Paul2660]

Looks like a severe head strike.  What is the paper thickness and what platen gap are you using?

Paul Caldwell

[RobinFaichney]

Actual paper thickness is 460 microns but in the driver settings it's 0.2mm with the platen gap set to auto, so I guess that's the problem. I changed the media type without checking the thickness setting. In this situation should I be worried about knock-on effects or just correct the settings and get back to printing?

Later: I've now successfully made the print on which the problem was encountered, it seems no damage was caused.