RetroArch Crashes on M3U File Load

I’m trying to open the The Legend of Dragoon 4-disc set as single game to share memory cards, but RetroArch crashes with this error whenever I try to load the M3U file:

RetroArch%20M3U%20Load%20Error

Can someone help me?

I just tried a multi-disc game and it ran fine. How do you have your M3U file setup? it should just be a copy-paste of the names of the CDs.

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My list seems to work with Mednafen.