Error in rule combine_postprocessing_csv

[sabdelrazek]

I received this error when I run python -m charcoal run myproject.conf -j 4 report. Any help with that please?
Error in rule combine_postprocessing_csv:
jobid: 72
output: output.newproject/stage2_summary.csv
shell:

    python -m charcoal.combine_csvs --sort-by remove_kb --reverse              > output.newproject/stage2_summary.csv

    (one of the commands exited with non-zero exit code; note that snakemake uses bash strict mode!)