Hi @mfaleevs
I think I saw you ask this in another topic but I can’t find it again. That’s Ok.
How to solve most reference annotation problems:
- Make sure to use the same exact reference annotation for all steps in the same analysis.
- That could be a built-in annotation (only supported with a few tools, and for a few reference genomes) or an annotation supplied by you from the history.
- GTF formatted annotation tends to work best. UCSC has this for hg38. Be sure to get it from their Downloads area, and not from the Table Browser. I’ll add a tag that links to prior Q&A with the “why”, or you can just try this way instead
- See the last section in this FAQ for exactly where to source the data and how to get it into Galaxy → Working with GFF GFT GTF2 GFF3 reference annotation
- Once the file is in your history, toggle the tool from to use “annotation from the history” and select the dataset.