I have the Canon imagePROGRAF PRO-300 that I purchased in April. Since I got it, I often get the error with support code 1000. I do everything the troubleshooting instructions tell me to do, and I still get it. The only time it works is when I'm using regular letter paper or the Canon paper. I'm trying to print my art for my Etsy shop, and I'm using fine art paper from the Red River company. It has let me use this paper many times, and then other times it gets stuck in a cycle where it won't accept that there's any paper there. It's driving me mad! Any help at all? Thanks in advance!