Nope the mgalaxy xml.
I don't use your system, you are using the "classic" Mame one or have created a custom one ?

For exemple for the Gamate system.

ok so it's a request issue.
Can you share the command line used in the xml file ?
On my side I use the same request on the console (cmd.exe) to compare and see problems.

And same question ^^, they are working in stand alone mode ?
If yes probably a problem in the request, else from the emulator setup.

Perhaps a version issue ? At every new Mame version you need to update lot of roms files.
On my side I m using Mame only for Arcade, you are sure Mame support them, lot of Mame hardware are just beta. For exemple for the Acorn Archimedes, the recommanded emulator is not Mame but Arculator or ArcEm.

And they are working in stand alone mode ?

It's working on my side, tested for Naomi rom.
You have tried in stand alone mode ?

Need to have 2 files for house of dead for exemple
- naomi.zip
- hotd2.zip

Had the same error than you 5mn ago, but was a path issue.

You can open the romset to see if you have the needed file inside.

All thoses system are still missing ? I m almost sure the Switch is native now ?

File version 2021.2.14.40468 mGalaxy version 9.0.0.0.0 Fresh version, I m starting a new instalation from scratch. I press "m" to have the menu, then I select "themes", and after the red message, all is freezed. But it's another issue ^^, I will make a new one if I m not alone with this issue.

Wich one format are you using ? On my side I have Cue+Iso, so I m listing only *.cue. On previous version I used a black list to don't show (disk 2, disk 3 and others), but I don't see this option on last version ? I think the better solution is making a personal database with removing unwanted ...

Lol, titles are so famous, generaly we know all of them.

He ? I have an old version but in my "script" folder I have a script called "Microsoft [Applications].au3"
This script will not make conflict with it ?

it launches a process called streetfighter6, then that process closes and another process is spawned with the same name. So I had to add a sleep of 30 seconds during the startup before looking for the process id to make sure I got the correct process and not the launcher Lol seriously ? So this ...

For me better to create a new one, to be sure it will not cause issue on the original one. And yes there is so much useless code in this script ^^, had so much issue with arcade game. But yes for the second issue, if it's the one you have (just need to check the mgalaxy state) it's the usefull part ...

I have this issue too generaly on lot of arcade game, it's because they are using loader. This kind of application, are application that launcch application that launch other applications, ect .... The script probably kill an application (that make you return to windows) but another one is still ...

Perhaps it's possible to mGalaxy to add a "preferered joystick" option in the application ?
On my side I haven't the issue on mGalaxy, but have it on some emulators, depend of plug/unplug devices.