helpviewer -V (return code: 1)
Unable to access the X Display, is $DISPLAY set properly?
helpviewer (return code: 0)
helpviewer.py -- Displays HTML Help in a wxHtmlHelpController window. Usage: helpviewer [--cache=path] helpfile [helpfile(s)...] Where helpfile is the path to either a .hhp file or a .zip file which contians a .hhp file. The .hhp files are the same as those used by Microsoft's HTML Help Workshop for creating CHM files.