I would investigate the overall system to see what has changed or is problematic, especially available free disk space. Variable behavior like this almost always (at least in my experience) is from the system environment, not necessarily a fault of the program. Check for available disk space and also that the disk is not overly fragmented. Wouldn't hurt to examine your System Log files and filter for any disk-related error messages.
Dave
---In QuadtoneRIP@yahoogroups.com, <brian_downunda@...> wrote :
.....
What is worrying is that one file that I'm certain printed alright this evening now generates the error. This makes me worry that it's a growing limitation of my system, rather than QTRGui.
Any insights?