I just went into Settings in the Unclogger, and switched the paper feed from Sheet to roll; no warnings; saved with a new name; and is operating like the sheet paper does.
I have done the same thing but found I had a very large print of the unclogger pattern even when set on half size. I then reduced the print size to A4 to be a more reasonable size.
Like Fred I have no roll paper and only looked at the page preview.
Can I print the unclog pattern on roll paper?
Why would you want the print the unclogger pattern on roll paper assuming it's a photo paper? Plain paper sheets are perfectly adequate and much cheaper.
Terry