nextflow: channel From Path returns null even though file exists

Question

I wanted to create a channel with certain files as below:

nextflow.enable.dsl=1
channel.FromPath('/cluster/projects/p33/users/gledak/metabolomics/lipids/out/*_permuted*.glm.linear').view()

But it gives me error:

Cannot invoke method view() on null object

Any help?

Answer 1

Channel factory methods (e.g. fromPath) and operators follow the lower camel case naming convention. What you want is:

Channel.fromPath('/cluster/projects/p33/users/gledak/metabolomics/lipids/out/*_permuted*.glm.linear').view()

Note that the old DSL1 is no longer supported.