@Breiztiger

I have also the "Illegal ?? vector value" error logs with my MAME build.
See https://git.redump.net/mame/commit/...ac9ca1d020ae9d1f335f7bbb8876680d5fb41603
MAME 0.237
Set locale on start so sorting in the UI works properly [Vas Crabb].


If you removed in src\osd\windows\winmain.cpp the new line 290 " std::setlocale(LC_ALL, ""); " the error logs disappear.
Or your set
std::setlocale(LC_ALL, "");
to
std::setlocale(LC_ALL, "en-US");