Problem with TIF

Working with large format printing and am having a problem with the tif x6 corel.
I have a Friendly Export corel in tif file after ripping and send it to print when printing out the gradient with a dash dividing the colors, and export as an error.
When I exported the x4 did not give this problem.
Will I have to stop using the x6, right now that I was enjoying it?
If anyone knows a way to solve this problem please speak tif, or if you like the tif x6 again be as it was the x4?