fix arg parser
fix arg parser

cmu-delphi/delphi-epidata,cmu-delphi/delphi-epidata,undefx/delphi-epidata,cmu-delphi/delphi-epidata,cmu-delphi/delphi-epidata,undefx/delphi-epidata,cmu-delphi/delphi-epidata,cmu-delphi/delphi-epidata