QTR-Quadtone RIP

is there a size limit to images printed with QTR?  I am printing an
image that is 24"x89" on an epson 7800.  when I go into the select
image menu, and I select the image, it doesn't show a thumbnail and
doesn't process...usually for me files take a second or two to
process.  If I select the image, it also doesnt show the thumbnail on
the main screen.

thanks for any help
joe