Carafe library generation

support
Carafe library generation Alejandro Brenes  2025-08-11 13:46
 

Trying to generate a library with carafe from a fasta file as shown in the tutorial. The report.tsv no longer exists but it can take the report.parquet file, however it seems to always fail with the following error:

Terminal modification is not supported:Ethyl of protein N-term

Not sure how to get round this nor why it appears

 
 
dshteyn responded:  2025-08-11 16:03

Thanks for trying the special Skyline build to run Carafe. This is an "unofficial" version special preview build with Carafe functionality. It is still being tested and perfected, your patience with any bugs you may encounter is appreciated. If you are able, please share your Skyline document, the training mzML file and the DIA-NN report and I would be glad to investigate these issues further, using the latest code of this branch, still under development.

Files which are less than 50MB can be attached to these support requests.

You can always upload larger files here:
https://skyline.ms/files.url

Thank you,
-David

 
BoW responded:  2025-08-12 11:42

Terminal modification is not supported:Ethyl of protein N-term

This is not an error. It is just a note to indicate N-term modification is not supported yet.

 
BoW responded:  2025-08-12 11:46

If DIA-NN version v2.2.0 is used, --export-quant is needed to add to the command line of DIA-NN search to export "Ms2.Scan" in the main report "report.parquet". If you run DIA-NN v2.2.0 through its GUI, you can add this parameter as shown in the figure attached.

 
Alejandro Brenes responded:  2025-08-13 02:52

thanks for that! it was indeed with DIA-NN V2.2. I have updated the parameters but now I get the issue that it says "No ions matched!"

 
BoW responded:  2025-08-13 09:01

It's possible that some ms2 scans (not many) at apex we extract for use for fine-tuning don't have any matches to some detected peptides. If that happens, you will see "No ions matched!" from the command line output. The corresponding peptide detections will not be used for training.

 
BoW responded:  2025-08-13 09:07

If you could share the two input files with me, I’d be happy to take a look and check for any issues.