I am using galaxy and in particular a modified version of a workflow that I found on usegalaxy.org.
Even if in the workflow I have everywhere indicated which one is the reference genome I wish to use, some steps such as the "Realigner target creator" on data coming from the step "Add or replace groups" give me a error because in the using reference genome section there are no options available and I don't know why that's happening and how to fix it.
Can anyone with more experience than me explain me how I should proceed?
Best regards. Alessandra