Error collecting output for parameter 'concat_meta_ms'

I got an error when processing Target:

[1;30mERROR[0m [31m[job ms_concat] Job error:
("Error collecting output for parameter 'concat_meta_ms': ../../../../usr/local/share/prefactor/steps/ms_concat.cwl:35:7: Multiple matches for output item that is a single file.", {})[0m

The command was:

cwltool \
	--no-container \
	--preserve-entire-environment \
	--parallel \
	--leave-tmpdir \
        --debug \
	--outdir=/storage/akurek/N4449_mozaik/L343256_DR2_pref_CWL/working_directory/results_target/ \
	--tmpdir-prefix=/storage/akurek/N4449_mozaik/L343256_DR2_pref_CWL/tmpdir/tar/ \
	/usr/local/share/prefactor/workflows/HBA_target.cwl HBA_target.json > logTar.txt 2>&1

Complete log (50 MB zipped, 2.5 GB unzipped): http://www.oa.uj.edu.pl/A.Kurek/logTar.zip

Json file: HBA_target.zip