Whooops, I forgot. The 7900 is a ten ink printer with orange and green, whereas the others are eight ink printers if my memory serves me correctly. This is the one area where Windows has a problem and Mac doesn't. QTRGui was written as a graphical interface to QTR a very long time ago, i.e. before the arrival of ten ink printers, and there's no longer any practical way to update it for printers like the 7900. If you have a .quad file you can print, but you can't create one from scratch. I think that's your problem.
There may be ways to fool it. You could create a curve for a nearly similar eight ink printer (7890?), and then manually edit the resulting quad file to add the green and orange channels (presumably set to zero), and then copy the file to the 7900 quad folder.
This is not my area of expertise. Perhaps someone with more experience with ten ink printers and QTR on Win can confirm or correct what I've said.
---In QuadtoneRIP@yahoogroups.com, <jon@...> wrote :
It is up to date.
The 7600 functions as does the 3880 just not the 7900., perplexing
From:
QuadtoneRIP@yahoogroups.com [mailto:QuadtoneRIP@yahoogroups.com]
Sent: Friday, May 10, 2019 7:03 PM
To: QuadtoneRIP@yahoogroups.com
Subject: [QuadtoneRIP] Re: Problem
Saving profile
Is your version of QTR up-to-date? There was a bug something like this in W10 that was fixed a while ago.