Squares with no ink glich, Photoshop -> imagePROGRAF PRO-4000

[LaboCirculaire]

I sent a composite print from Photoshop and the print came out with square sections that didn't print over two of the images. It's happened to us a couple of times over the years and we've never figured out why it happens. We would be very interested to know how to avoid this. Printing from Photoshop CC2024, Canon ImagePrograf P4000, Japanese washi paper.

[SamanthaW]

Just to clarify, are you working with the imagePROGRAF PRO-4000 or another model? We don't see one that's just P4000 so we want to be sure we're all talking about the same unit! 

[LaboCirculaire]

Yes sorry,  imagePROGRAF PRO-4000, we call it that in-house for brevity.