Quark 6 PostScript can't be processed in Preps 4.2.2

There is something seriously wrong with Quark 6 PostScript printing.

I could not see a single PostScript file printed from Quark 6 processed by
Creo Preps 4.2.2.I am placing composite PostScript files into Preps.
Each and every single PS file is failing in Preps 4.2.2 with the following
PostScript error while priintg to Composite/separation from Preps:

%%[Error: Undefined; OffendingCommand: bn ]%%

I thought something is wrong with my file or setup. But, to my surprise, PS files printed from Quark 5, Illustrator,InDesign passed smoothly.
I reduced my file content to a simple 100 % yellow box.It failed.

So, it is *not* a problem in my file or Preps which I am using for long time and gives reliable output consistently.

THIS IS A BUG In QUARK 6 PRINT.

[Cory]

Creo just released a 4.2.3 update for preps, but looking at the release notes it doesn't say anything about QXP 6 incompatability..

are you able to use a page you saved as an eps from quark?