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RetroArch MAME only loading some games?


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I know - another "Launchbox won't load retroarch MAME" question. Sorry. I am reasonably well versed in this stuff at this point and I am stuck. I will address the common follow-ups real quick:

Yes, "extract roms" is unchecked in both the main setting and associated tab.

Yes, Retroarch WILL run any MAME rom I ask it to from within Retroarch itself.

Yes, I know I should "just use MAME", but MAME has the issue of needing controllers setup and frequently confusing which monitor to display on, and I wanted this to be a portable version of Launchbox. Retroarch MAME is super easy in terms of needing little setup.

Launchbox RA-mame will load some roms, oddly. Neo Geo stuff like 3 Count Bout and Sega's Altered Beast work. However MANY, most even, titles won't load. Games Aliens and Alien vs Predator. I am giving examples early in the alphabet because this was an instant test and fail situation. I've played around a lot and can't get launchbox to load. Again, these do guaranteed work and load in Retroarch, so it has to be something in the LB communication. And the fact that a few do work means that it's not a path issue. 

Any advice or new things to look at is greatly appreciated.

Thanks guys!

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Could be a core selected/rom issue. 

Do you have all these games in the same platform or in different platforms (some users will separate arcade boards into unique platforms)? 

What would be helpful is sharing some pics. 

Edit Retroarch in LB and post pics of the Main tab and Associated Platforms tab. 

Edit a game that is not working and post a pic of the main details tab, the Launching tab, and the Emulation tab. 

 

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49 minutes ago, Retro808 said:

Could be a core selected/rom issue. 

Do you have all these games in the same platform or in different platforms (some users will separate arcade boards into unique platforms)? 

What would be helpful is sharing some pics. 

I will post some pics late when I am back home.

I can tell you that these are all imported as one platform (arcade) and all have the same core association. Adding actual MAME as a secondary launch option works and LB will launch through actual MAME, but not through RA MAME, even though RA MAME will launch and run them all fine without Launchbox. 

This was a fresh build using the latest LB. I have never had this issue in the past. I can't make sense of it.

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