Hi,

I have encountered an issue wherein if I try to convert a mascot .dat file 
to pepxml, it does the conversion and when I try to use this pepxml  to run 
peptideprophet and proteinprophet, it fails. 

I tried to check if .dat to pepxml conversion worked properly, but realised 
that when I click on the pepxml, nothing loads on the pepxml viewer and I 
also saw that usually there is an index file that is created and in this 
case, it did not create the index file as well. Just to make sure the .dat 
file is good, i was also able to open it up on Scaffold and see some 
proteins.

This is the link to the shared dropbox folder called "TPP"
https://www.dropbox.com/sh/4unsley0gir7jve/7D3-XANnj8

I have 2 folders there, one called "working files" where I tested a .dat 
file (from same samle, different fraction) conversion to pepxml and ran 
peptide and protein prophet and it worked successfully. The other folder 
called "not working files" has the .dat file which failed to run peptide 
and protein prophet. Also attached are .mzxml, .pepxml, the log of 
conversion from .dat to .pepxml and errorlog of conversion from pepxml to 
peptide and protein prophet along with screenshots. I have also included 
the fasta file I used in the "Fasta" folder. 

Can you anyone guide me as to what could have gone wrong?

Thanks in advance,
Vidya

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