write errors to stderr instead of stdout to avoid contaminating real output.
write errors to stderr instead of stdout to avoid contaminating real output.

EichlerLab/pacbio_variant_caller,EichlerLab/pacbio_variant_caller,EichlerLab/pacbio_variant_caller,EichlerLab/pacbio_variant_caller,EichlerLab/pacbio_variant_caller