When I try to change the value of the fasta parameter by putting params.fasta = getGenomeAttribute('fasta') in my main script of my pipeline, when I try to print the value or $params.fasta or when I try to pass it to a workflow, I get an error saying that the module doesn’t take null as an input or it simply prints out null.

I just used the create method to make a new pipeline and used the normal template.