Errors On TIFF Export

[mvpdigital]

I have encountered these errors on occasion in the past, but I am currently working on a photo restoration project, and it's becoming a real nuisance.

Does Xtreme Pro 4 have a limit on image size for TIFF export?

For example, if I import a TIFF image (these are scans at 600dpi), it shows in Xtreme as around 1000x700ppi (at 96dpi). I then colour correct and try to export a TIFF image (at 600dpi, around 6000dpix4000dpi), I get the first error in the attached gif file. So I tried reducing the export size to 550dpi, and then I got the the second error. I finally reduced the export size to 500dpi, and it exported.

Anyone know what the issue is?

I should add that I am exporting at 24 bits per pixel with no compression.