printing a file from Canon MKIII, A tree with its shadows on snow" has lots of wide( around 4 cm) magenta banding in shadows and not in suny parts. Printing with 2 almost new 118800 both have the same problem. Banding are random and in each print change their places. Other files are printed okay. strange things is I can't see these magenta banding on monitor! tried different OS, computer, application and color space didn't help.