Hi David,

I'll attempt to re-run PTMProphet analysis on a few problematic datasets 
with MAXTHREADS=1. 

I am currently using the version of PTMProphet that came with the 
installation of TPP 5.2. Is there a newer version available that I could be 
using instead?

Thanks for your help!
-Will

On Tuesday, March 16, 2021 at 7:37:58 PM UTC-4 David Shteynberg wrote:

> Hello Will, 
>
> We routinely run PTMProphet on datasets containing multiple hundreds of 
> thousands of PSMs. This looks like multithreading issue 
> related MAXTHREADS=0 parameter, this should not happen if you use 
> MAXTHREADS=1.  I have corrected several bugs related to multithreading in 
> the codebase. Which version of PTMProphet are you using? 
>
> Thanks,
> -David
>
> On Tue, Mar 16, 2021 at 3:59 PM Will Comstock <[email protected]> wrote:
>
>> Hey everyone,
>>
>> I've run into an issue with PTMProphet where occasionally the command 
>> will fail for unknown reasons and the resulting ptm.pep.xml cannot be 
>> opened with the PepXML viewer. The command log seems to cut off abruptly, 
>> as pictured in the attached screenshot. Also attached is the page that 
>> appears upon trying to open the ptm.pep.xml. 
>>
>> The interact.pep.xml files we're analyzing clock in at about 200 to 250 
>> megabytes. As a workaround, we currently just split the initial batch of 
>> pep.xmls into smaller groups before running PeptideProphet and PTMProphet 
>> on them again. Sometimes we end up with batches of pep.xmls as small as 3 
>> or 4 files, which is somewhat inconvenient for projects with hundreds of 
>> RAW files. 
>>
>> Is there another way around this issue? We've tried running it through 
>> the command line as well and this problem still crops up frequently.
>> [image: PTMproph_CommandFailed.png]
>> [image: PTMproph_CommandFailed_xmlError.png]
>> Thanks!
>>
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