5.5 Crashing with EXCEPTION_ACCESS_VIOLATION

Development Programming & Scripting
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1

I’ve seen various topics about this, but none of the suggested solutions have worked for me. The engine will randomly crash or fail to launch with an error along the lines of
Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000001a50800070

Full stack trace: Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000001a508000 - Pastebin.com

I can’t identify any rhyme or reason for the crash. I’m running the latest NVIDIA drivers and have even tried rolling back to a known stable version.

My hardware specs are as follows:
Intel Core i9-14900KF
MSI PRO Z790-P WIFI (MS-7E06)
ASUS ROG STRIX RTX 4070 Ti SUPER GAMING
2x CMK48GX5M2B7000C40 (DDR5 24GB sticks) Memory speed 3500

2
  1. UnrealEditor_Core!mi_free() [D:\build++UE5\Sync\Engine\Source\ThirdParty\mimalloc\2.0.0\src\alloc.c:486]

it is trying to free an invalid pointer.

Seems it is a bug.

Did you installed a pluging or something?

3

it happens on multiple engine versions, regardless of plugins or not. It happens in multiple projects but other team members do not experience crashes. It seems isolated to my machine

4

Did you delete the Intermediate, Binaries, and Saved folders and try rebuilding them?

5

Yeah, I’ve tried this, unfortunately to no avail!

6

Hi there! Looking really far down the callstack I’m seeing this UnrealEditor_Core!FModuleManager::LoadModuleWithFailureReason() - so I’d suspect some kind of plugin module. Looking a bit up from there in the stack it appears like it might be related to the AudioWidgets plugin. I’d investigate that - maybe try disabling it and/or clearing it out entirely.

7

Thanks for responding! The crashes happen in multiple projects, even brand new ones without plugins, so I’m not sure if I could isolate it to a specific piece of code. It seems to be more like an issue with the GPU itself.