Emulator

I forgot to mention that the problem doesn't occur when loading Brawl normally (with no launcher)

I'm purposely not using a NAND dump to document which of my games need an IOS manually installed. Trying a system update on Dolphin resulted in Error Code: 32004. Were you using a NAND dump when you couldn't reproduce the issue? This issue occurred when booting Gecko OS from the game list and booting the Homebrew channel from the game list to load Gecko OS.

Also reproducible with Minima Launcher (Hook Fix)

You're missing necessary IOSes to run the Virtual Console Masterpieces.

If that's the case could I know which ones are needed to get the masterpieces working? I've only installed IOS 21 and 36.

Run Brawl in the Wii System Menu and install the disc update, or maybe try right clicking the Brawl disc and install disc update.

Reproduced in 5.0-6327 on Android. My dolphin-emu folder is independent from my PC build. I moved my Android dolphin-emu folder to PC to install IOS 21 and 36 and moved it back. This means the problem is less likely to be something that I screwed up.

Created #10921 and #10922 from the information in this issue, as they were separate issues. The underlying problem of this issue still remains.

I have a theory that Gecko OS and Minima Launcher use IOS 249 (normally a stub but commonly used for custom IOS) for loading masterpiece games. Project M launcher likely uses a different IOS.

I want to install d2x cIOS v10 beta 52, slot IOS 249, base IOS 56 to test this but the installer WAD downloads a base IOS and patches it. I'd be nice to somehow get that patched IOS. I tried it once and failed on Dolphin so I'll need to investigate further.

Dolphin can't run actual IOSes, so installing it won't do anything.

I should clarify. Dolphin recently began showing "Dolphin doesn't emulate IOS title 00000001000000f9" when using Gecko OS, which is IOS 249 (normally a stub). USB Loaders commonly use cIOS 249 for loading titles so it would make sense if a lack of cIOS 249 emulation prevents masterpiece games from being loaded.

Does this sound like a good guess?

Minima Launcher doesn't display "Dolphin doesn't emulate IOS title 00000001000000f9" so that weakens my theory...

I tried a BootMii NAND backup from my real Wii but the issue still remains. It's weird that leoetlino can't reproduce this. Can somebody else try reproducing this using the updated instructions in the comment starting with "Please update title to"?

Since people have trouble reproducing this, here is a minidump: http://www.mediafire.com/file/qrm6e8tlvstiviy/DolphinFPC.rar/file

Dolphin debug build with the debugger attached frequently raised access violation exceptions during startup of Super Smash Bros. Brawl. I disabled breaking when that type of exception was hit. I was able to reproduce the problem but the debugger didn't raise an exception. I just paused frozen Dolphin from the debugger and dumped from there.

I'll repeat the steps to reproduce this issue for convenience:

First time prep:

1. Install IOS 21 (for Masterpiece Games) and 36 (for Gecko OS)
2. Set Brawl as Default ISO
3. Obtain latest version of Gecko OS
4. Enable "Insert SD card"
5. Create a "codes" folder in the root of your SD card
6. Add the attached .gct to the "codes" folder

After initial setup:

1. Run Brawl through a launcher.
2. Play a masterpiece game (tested with Super Mario Bros.)
3. Observe crash with Gecko OS but not Project M Launcher

I was able to reproduce this issue on a friend's computer:
AMD Phenom(tm) II X6 1100T Processor 3.30 GHz
Installed memory (RAM): 8.00 GB
Win 10 64-bit Operating System, x64-based processor
AMD Radeon HD 6800 Series
Graphics version: 15.301.1901-160226a-299900E

Note, Minima Launcher posted a new release that now includes the hook fix: https://github.com/iGlitch/MinimaLauncher