Unknown option: mask on snippy-clean_full_aln

[KatyaArnold]

Hi, Torsten, I am trying to use --mask option on snippy-clean_full_aln core.full.aln > clean.full.aln step for masking phage regions: snippy-clean_full_aln core.full.aln --mask PHASTER/phaster.bed> clean.full.aln and getting a following error: Unknown option: mask

My .bed file looks like this (no spaces, only tabs): Reference 368458 408984 Reference 1094858 1142017 Reference 1958166 1972101 Reference 2079346 2134623 Reference 2771858 2817833

Would be glad to your help