Jimmy is right; the Mascot pepXml feature is outdated because the
schema has evolved.
At ASMS I asked Matrix if they would update to the latest schema. But
I doubt it's a priority for them.

On Jun 29, 11:16 am, Jimmy Eng <[email protected]> wrote:
> I would be a little concerned with "my files were transferred as xml
> after mascot searching was done".  What generated the xml files and in
> what format are they?  I believe that Mascot exported pep.xml files
> won't run through the TPP correctly (but I could be wrong).
>
> The only advice I can give you is to follow the following steps to get
> Mascot data analyze through the TPP:
> - take your data and convert to mzXML
> - generate mgf files from that mzXML
> - search the mgf files through Mascot
> - go bring back mascot search results in .dat format
> - rename the .dat files to the same base name as mzXML
> - convert the .dat to pep.xml
> - use those pep.xml files as input to the PeptideProphet
>
> Any deviations from the above steps will only cause problems.
>
> On Mon, Jun 28, 2010 at 6:43 AM, chunchao <[email protected]> wrote:
> > It always give me an error message when I run PeptideProphet. My files
> > were transferred as xml after mascot searching was done. The error
> > message are as follows. Cound somebody tell me what's going on? Thank
> > you in advance!
>
> > # Commands for session HMHX2UYYT on Wed May 26 12:03:21 2010
> > # BEGIN COMMAND BLOCK
> > ###### BEGIN Command Execution ######
> > [Wed May 26 12:03:21 2010] EXECUTING: run_in c:/Inetpub/wwwroot/ISB/
> > data; c:\Inetpub\tpp-bin\xinteract  -Ninteract.pep.xml -p0.05 -l7 -O
> > c:/Inetpub/wwwroot/ISB/data/C1_trypsin_1.xml c:/Inetpub/wwwroot/ISB/
> > data/C1_trypsin_2.xml c:/Inetpub/wwwroot/ISB/data/C1_trypsin_3.xml c:/
> > Inetpub/wwwroot/ISB/data/C2_trypsin_1.xml
> > OUTPUT:
>
> > c:\Inetpub\tpp-bin\xinteract (TPP v4.3 JETSTREAM rev 0, Build
> > 200908071234 (MinGW))
>
> > running: "C:/Inetpub/tpp-bin/InteractParser "interact.pep.xml" "c:/
> > Inetpub/wwwroot/ISB/data/C1_trypsin_1.xml" "c:/Inetpub/wwwroot/ISB/
> > data/C1_trypsin_2.xml" "c:/Inetpub/wwwroot/ISB/data/C1_trypsin_3.xml"
> > "c:/Inetpub/wwwroot/ISB/data/C2_trypsin_1.xml" -L"7""
> >  file 1: c:/Inetpub/wwwroot/ISB/data/C1_trypsin_1.xml
> >  file 2: c:/Inetpub/wwwroot/ISB/data/C1_trypsin_2.xml
> >  file 3: c:/Inetpub/wwwroot/ISB/data/C1_trypsin_3.xml
> >  file 4: c:/Inetpub/wwwroot/ISB/data/C2_trypsin_1.xml
> >  processed altogether 8267 results
>
> >  results written to file c:/Inetpub/wwwroot/ISB/data/interact.pep.xml
>
> >  direct your browser tohttp://localhost/ISB/data/interact.pep.shtml
>
> > command completed in 18 sec
>
> > running: "C:/Inetpub/tpp-bin/PeptideProphetParser "interact.pep.xml"
> > MINPROB=0.05"
> >  (MASCOT)
> > error: -1.0 homology score
>
> > command "C:/Inetpub/tpp-bin/PeptideProphetParser "interact.pep.xml"
> > MINPROB=0.05" failed: Operation not permitted
>
> > command "C:/Inetpub/tpp-bin/PeptideProphetParser "interact.pep.xml"
> > MINPROB=0.05" exited with non-zero exit code: 1
> > QUIT - the job is incomplete
>
> > command "c:\Inetpub\tpp-bin\xinteract -Ninteract.pep.xml -p0.05 -l7 -O
> > c:/Inetpub/wwwroot/ISB/data/C1_trypsin_1.xml c:/Inetpub/wwwroot/ISB/
> > data/C1_trypsin_2.xml c:/Inetpub/wwwroot/ISB/data/C1_trypsin_3.xml c:/
> > Inetpub/wwwroot/ISB/data/C2_trypsin_1.xml" failed: Operation not
> > permitted
> > END OUTPUT
> > RETURN CODE:256
> > ###### End Command Execution ######
> > # All finished at Wed May 26 12:03:42 2010
> > # END COMMAND BLOCK
>
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