I know I'll be ashamed when I find out the answer but I am not able to get xinteract to run manually via command line on my windows dev server.
C:\tmp\ms2sandbox\2_32_48_64_72_79\xtandem\singleMod_both>C:\CPAS\build\deploy\bin\xinteract -x20 -Opt -nR -p0.0 010511_f32a_raw.pep.xml 010515_f02_raw.pep.xml

C:\CPAS\build\deploy\bin\xinteract (TPP v4.3 JETSTREAM rev 1, Build 200909211148
 (MSVC))
error: file C:/Inetpub/tpp-bin/InteractParser does not exist

I've set WEBSERVER_ROOT to C:\CPAS\build\deploy\bin\
and confirmed that C:\CPAS\build\deploy\bin\ is on the PATH

The binaries are from the repository trunk. What have I forgotten?
Thanks,
Bill