__debugbreak() on game launch

[void2012]

I get a __debugbreak() in UIScene::loadMovie
Platform: Windows 10 IoT Enterprise LTSC, Visual Studio 2026 with MSVC v14.51 Win64
Callstack:

Minecraft.Client.exe!UIScene::loadMovie() Line 341
	at C:\Minecraft\Minecraft.Client\Common\UI\UIScene.cpp(341)
Minecraft.Client.exe!UIScene::initialiseMovie() Line 229
	at C:\Minecraft\Minecraft.Client\Common\UI\UIScene.cpp(229)
Minecraft.Client.exe!UIComponent_Tooltips::UIComponent_Tooltips(int iPad, void * initData, UILayer * parentLayer) Line 15
	at C:\Minecraft\Minecraft.Client\Common\UI\UIComponent_Tooltips.cpp(15)
Minecraft.Client.exe!UILayer::addComponent(int iPad, EUIScene scene, void * initData) Line 531
	at C:\Minecraft\Minecraft.Client\Common\UI\UILayer.cpp(531)
Minecraft.Client.exe!UIGroup::UIGroup(EUIGroup group, int iPad) Line 24
	at C:\Minecraft\Minecraft.Client\Common\UI\UIGroup.cpp(24)
Minecraft.Client.exe!UIController::postInit() Line 280
	at C:\Minecraft\Minecraft.Client\Common\UI\UIController.cpp(280)
Minecraft.Client.exe!WinMain(HINSTANCE__ * hInstance, HINSTANCE__ * hPrevInstance, char * lpCmdLine, int nCmdShow) Line 818
	at C:\Minecraft\Minecraft.Client\Windows64\Windows64_Minecraft.cpp(818)

[void2012]

Debug output:

Exception thrown at 0x00007FFCEDFB5369 in Minecraft.Client.exe: Microsoft C++ exception: _com_error at memory location 0x0000004BBECFF9F0.
Loading archive file...
archive file - Common\Media\MediaWindows64.arc
Finished loading archive file
Exception thrown at 0x00007FFCEDFB5369 in Minecraft.Client.exe: Microsoft C++ exception: _com_error at memory location 0x0000004BBECFFB70.
StringTable:: Can't find language 'en-US'.
StringTable:: Found language 'en-EN'.
<GLYPH_291> 243	 	U+00F3, kerning=6, (12,15). MISSMATCHED!
<GLYPH_292> 211	 	U+00D3, kerning=6, (12,16). MISSMATCHED!
<GLYPH_390> 31	 	U+0020, kerning=5, (16,22). MISSMATCHED!
<GLYPH_456> 32	 	U+0000, kerning=5, (19,19). MISSMATCHED!
<GLYPH_457> 32	 	U+0000, kerning=5, (19,20). MISSMATCHED!
<GLYPH_458> 32	 	U+0000, kerning=5, (19,21). MISSMATCHED!
<GLYPH_459> 32	 	U+0000, kerning=5, (19,22). MISSMATCHED!
<GLYPH_291> 243	 	U+00F3, kerning=7, (12,15). MISSMATCHED!
<GLYPH_292> 211	 	U+00D3, kerning=8, (12,16). MISSMATCHED!
<GLYPH_390> 31	 	U+0020, kerning=7, (16,22). MISSMATCHED!
<GLYPH_456> 32	 	U+0000, kerning=7, (19,19). MISSMATCHED!
<GLYPH_457> 32	 	U+0000, kerning=7, (19,20). MISSMATCHED!
<GLYPH_458> 32	 	U+0000, kerning=7, (19,21). MISSMATCHED!
<GLYPH_459> 32	 	U+0000, kerning=7, (19,22). MISSMATCHED!
Iggy Error: Attempted to import undefined library platformskinHD.swf
Iggy Error: Attempted to import undefined library platformskinHD.swf
Iggy Error: Attempted to import undefined library skinHD.swf
Iggy Error: Invalid Iggy passed to IggyPlayerInitializeAndTickRS
ERROR: Failed to load iggy scene!
A breakpoint instruction (__debugbreak() statement or a similar call) was executed in Minecraft.Client.exe.

[void2012]

Works on Windows non-IoT Windows 10 and Windows 11

[laz1444]

I tried latest code and still doesn't work on my Windows 10 pro. Same crash and same debug output.

[MijaeLio]

Same crash and debug output here too on Windows 11 Pro

[Back-Slash-N]

windows 10 pro vm, same deal

[fantomfiter]

same issue here

[smartcmd]

maybe due to the resolution patch

[void2012]

Fixed in df2925a

So it appears that @smartcmd initially uploaded the repo with his "fix" for DPI-awareness on modern Windows, but this broke the Iggy player component which couldn't correctly display the video tracks. I comment out this code until there is an adequate implementation. Thank you guys on discord for sniffing this one! I tried searching the git repo and reverting things for me locally but couldn't find this one was really tricky.

Closing as hopefully fixed forever.