thinkjettopbm --version (return code: 0)
thinkjettopbm: Using libpbm from Netpbm Version: Netpbm 10.0
thinkjettopbm: BSD defined
thinkjettopbm: RGB_ENV='RGBDEF'
thinkjettopbm: RGBENV= 'RGBDEF' (env vbl is unset)
thinkjettopbm -HELP (return code: 1)
thinkjettopbm: invalid option -- 'h'
thinkjettopbm: Usage: thinkjettopbm [-d] [thinkjet_file]