usage: rna_calc_rmsd.py [-h] [-t TARGET_FN] [--ignore-files IGNORE_FILES] [--target-selection TARGET_SELECTION] [--target-ignore-selection TARGET_IGNORE_SELECTION] [--model-selection MODEL_SELECTION] [--model-ignore-selection MODEL_IGNORE_SELECTION] [-m METHOD] [-o RMSDS_FN] [-v] [-pr] [-sr] [-pp] [--way WAY] [--name-rmsd-column NAME_RMSD_COLUMN] [--target-column-name] files [files ...] rna_calc_rmsd.py: error: the following arguments are required: files DONE!