Damian,

As David noted, in Comet 2020 I unfortunately got rid of a search score
that causes the behavior you're seeing.  And yes, if I could go back in
time, I would not have made that change again because of this noted issue.
As a quick intermediate fix until you've updated to the TPP 6 release, run
this command on your pep.xml files which should then allow them to be
processed through the older TPP versions.

perl -i -pe 's/<search_score name="deltacn"/<search_score
name="deltacnstar" value="0.0"\/>\n <search_score name="deltacn"/g;'
yourfile.pep.xml


On Sat, Apr 24, 2021 at 9:09 AM dfermin <[email protected]> wrote:

> Hello
>
> I performed a search on 4 mzML files against a human proteome file with
> decoys appended. The decoy prefix I'm using is 'rev_'
>
> I ran comet version 2020.01 rev 3 on the mzML file and got out the
> comet-generated pep.xml files.
>
> When I run xinteract on these files  PeptideProphet seems unable to find
> any spectra.
> I've looked at the pep.xml files comet generated and it has all the usual
> features. The files contain the top 5 hits for each spectra.
>
> Any suggestions what might be wrong?
> Thanks in advance for any and all help.
>
> I'm running TPP v5.2.0 on a Centos 7  box in case it helps
> Here is the stdout on the terminal:
> #==================================================================
> [dfermin tmp]$ xinteract -Opwd -drev *.pep.xml
>
> xinteract (TPP v5.2.0 Flammagenitus, Build 201904020842-exported
> (Linux-x86_64))
>
> running: "/usr/local/apps/tpp/bin/InteractParser 'interact.pep.xml'
> '01347_H01_P013678_S00_N08_R2.pep.xml'
> '01347_H02_P013678_S00_N16_R2.pep.xml'
> '01347_H03_P013678_S00_N24_R2.pep.xml'
> '01347_H04_P013678_S00_N32_R2.pep.xml' -L'7'"
>  file 1: 01347_H01_P013678_S00_N08_R2.pep.xml
>  file 2: 01347_H02_P013678_S00_N16_R2.pep.xml
>  file 3: 01347_H03_P013678_S00_N24_R2.pep.xml
>  file 4: 01347_H04_P013678_S00_N32_R2.pep.xml
>  processed altogether 203112 results
> INFO: Results written to file: /nfs/md0/testRun2021/interact.pep.xml
> command completed in 104 sec
>
> running: "/usr/local/apps/tpp/bin/DatabaseParser 'interact.pep.xml'"
> command completed in 1 sec
>
> running: "/usr/local/apps/tpp/bin/RefreshParser 'interact.pep.xml'
> '/nfs/md0/tpp.data/human_uniprot_withIsoforms.2021-04-14.plusREV.fa'"
>   - Building Commentz-Walter keyword tree...
>   - Searching the tree...
>   - Linking duplicate entries...
>   - Printing results...
>
> command completed in 62 sec
>
> running: "/usr/local/apps/tpp/bin/PeptideProphetParser 'interact.pep.xml'
> INSTRWARN DECOYPROBS DECOY=rev"
> Using no error on different instrument types.
> Using Decoy Label "rev".
> Decoy Probabilities will be reported.
>  (Comet)
> init with Comet trypsin
> MS Instrument info: Manufacturer: UNKNOWN, Model: UNKNOWN, Ionization:
> UNKNOWN, Analyzer: UNKNOWN, Detector: UNKNOWN
>
> INFO: Processing standard MixtureModel ...
>  PeptideProphet  (TPP v5.2.0 Flammagenitus, Build 201904020842-exported
> (Linux-x86_64)) AKeller@ISB
>  read in 0 1+, 0 2+, 0 3+, 0 4+, 0 5+, 0 6+, and 0 7+ spectra.
>  read in no data
>
> command "/usr/local/apps/tpp/bin/PeptideProphetParser 'interact.pep.xml'
> INSTRWARN DECOYPROBS DECOY=rev" exited with non-zero exit code: 256
> QUIT - the job is incomplete
>
>
>
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