Dana - I am having a problem when using the gloss optimizer on an Epson 7900. It's not really the optimizer, per se, it's how much of the print gets covered by the GO. I have had this problem before.
This last weekend I printed out two glossy inks prints using paper approximately 24X42 inches. Since that is not a standard size I entered those dimensions in the system. The first print was properly covered with GO.
I put in print no. 2 of exactly the same size. The gloss optimizer only printed about 9 inches before quitting. I double checked the dimensions to see If I had accidentally changed the setting. I hadn't changed anything. I tried again. Attempt no. 2 covered the same 9 inches!
I decided to try and fool the program and make it think it was doing something different. I changed the dimensions to 24X41. It printed about 14 inches of gloss optimized print before ending - about a five inch gain. I then turned off the QTR program, restarted it and then tried again. It again printed about 14 inches. I put in a sheet of 8.5X11 paper. It covered the sheet just fine!
Patting myself on my back for curing the problem, I then put in the large custom sized print back in the machine. I set in the dimensions of 24X41 and hit print. It only covered about 14 inches before quitting.
I then quit the program and decided maybe doing a "restart" on my computer would create the cure by wiping out any "bad" data in RAM. I decided to try a 13X19 sheet of paper. It worked just fine and completely covered the sheet.
My thought was maybe the custom size was creating the problem so I used a standard 24X36 inch print size. I did this because every previous time I used the standard sizes GO worked great and covered the size selected.
As you might surmise from my long missive requesting assistance is that the 24X36 standard size did not cover 24X36. It only printed about 14 inches before quitting. Custom or standard sizes did make any difference on big prints. The first big print GOd just fine in custom size. Print No. 2 as just a disaster. Standard size was therefore no cure. I had the same problem before using 13X19 or 17X22 sheets - partial coverage only. It sort of cured itself, though. Why? I don't know.
Any suggestions for a cure? Having a problem like this on a large print is proving to be a pricey problem.