Hello.

I'm trying out iProphet on some data I have but I'm not using the
Petunia interface. The data I have consists of the same experiment
searched with X!TANDEM and MASCOT.

I'm doing all this from the command line and so I've already prepared
the search results via Tandem2XML and Mascot2XML. Now I run xinteract
as follows:

xinteract -Od -ip -drev -Niproph *.XML

Things seem to go fine but then I get this error message:
=======================
... loading files....
 file 74: UM_2010_0747.XML
 file 75: UM_2010_0748.XML
 processed altogether 788948 results

 results written to file /data/users/dfermin/iProphet/interact-
iproph.pep.shtml

command completed in 181 sec

running: "/usr/local/apps/dev.tpp/bin/PeptideProphetParser 'interact-
iproph.pep.xml' DECOYPROBS DECOY=rev"
Using Decoy Label "rev".
Decoy Probabilities will be reported.
 (MASCOT)
error: -1.0 ion score

command "/usr/local/apps/dev.tpp/bin/PeptideProphetParser 'interact-
iproph.pep.xml' DECOYPROBS DECOY=rev" exited with non-zero exit code:
256
QUIT - the job is incomplete
=======================

xinteract works fine on just the XTANDEM results or just the MASCOT
results but it gives this error whenever I try to "merge" the results.
Has any one got a suggestion of what is going wrong?

Thanks in advance for any and all help.
Damian
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