I always wondered how to pass parameters to ps2pdf on windows and ended up with
Unknown paper size: ().
Unrecoverable error: stackunderflow in dup.
In the documentation it's so easy and on Linux it works like a charm. On Windows, however, the right way to set parameters is using a hash symbol: # instead of the equal sign =:
ps2pdf -sPAPERSIZE#a4 test.ps test.pdf.
I found this answer at the end of this thread and hope this post gives the solution some visibility....
(2010-02-05)