QTR-Quadtone RIP

Dear all,

we have problem (i suppose) with Print Tool on a Mac.
We print 1-bit tiff files through QRT to the Epson 9900, and print is OK if we print files with dimensions cca 30000x47000 pixels, even when we place to GUI several copies of that file and print them together. But when printed file with height more than cca 50000 pixels, printer prints just solid black area, no matter image data. We do not know where limit exactly is, as testing is very time consuming. Printing the same file cropped to approx 1/2 is OK, but what is interesting, original big file, which we move cca 1/2 outside from paper format is printed not OK (same black box again). We test another workflow, and original not cropped big file, printed from Mac application Preview to QTR Rip is OK.
Considering all of this, IMHO this is some kind of problem in QRT Print tool, which -probably- is working with some pixel size limit (probably not in terms of data size or resolution, but linear pixel limit).
I understand, that 60000 pixels is not low value, but note that image file size is consíderably lower, cca 350MB.
Any ideas, workarounds, experiences?

Attached in album (see link bellow) are images (original screenshot was "stolen" from www.piezography.com, sorry, but i have not access to QTR Print tool at this time) with very basic and rough explanation fo problem (not real screenshots).

Thank you very much for your time and support.
Hope you understand, as English is not my native language.

All the best
Kamil Tresnak



http://groups.yahoo.com/group/QuadtoneRIP/photos/album/886111318/pic/1239631189/view