Warning for split

[ygrange]

I built the trunk version today and opened the cwl from here: https://github.com/EOSC-LOFAR/prefactor-cwl (you'll have to do a make no-singularitry first). It gives me a warning about a discrepancy between ms_array: Directory[] in the inputs in prefactor.cwl and type: Directory for the msin input in nddppp_prep_cal.cwl. The warning looks like: document.steps[4].in[13].source[ms_array]: Invalid connection. Connection type mismatch, attempting to connect "Directory[]" to "Directory"

However, this is the result of a scatter. So after consulting with @mr-c I'm filing it as bug report here.