Note: help and version output are generated by a naïve script which tries a few variants of
<command> --help, <command> -h etc. to find the command's help and version info.
Sometimes it gets lucky, sometimes it doesn't; if the output below looks wrong, it probably is.
gns3 -V (return code: 1)
gns3 --HELP (return code: -15)
Usage: gns3 [--debug] [--configdir <config_dir>] <net_file>
gns3: error: no such option: --HELP