Ran same command. GUI does not launch and output.txt changes to this...
Quote: MAMEUI starting Win32UI_init: About to init options
If i only delete MAME_g.ini, output.txt is...
Quote: MAMEUI starting Win32UI_init: About to init options OptionsInit: About to load MAMEUI.ini OptionsInit: About to load ini\ui.ini OptionsInit: About to load MAME_g.ini game_opts.cpp::load_file : Rebuilding cache