Error in eval_tidy('ws', ...) : Bareword "ws" not allowed while "strict subs" in use at make_plot_test.pl line 10.
 at /usr/local/share/perl/5.26.1/Eval/Quosure.pm line 76.
  at /usr/local/share/perl/5.26.1/Data/Frame/Partial/Eval.pm line 41.