InstaMAT has hard crashed 5 times over the span of 30 minutes

WigglyPigglyVRC · June 9, 2026, 8:39pm

A fatal error occurred and the program has to terminate. Unhandled exception at 0x8c012ab6. Access violation reading 0x24.

Is this an issue with my memory or the software itself?

I’ve also noticed it taking longer to start-up.

A fatal error occurred and the program has to terminate.
Unhandled exception at 0x5f8cecb0. Access violation reading 0x8.

Stack trace: 
0x5f8cecb0 Module[Qt6Widgets.dll]
0x5faff7e6 Module[Qt6Widgets.dll]
0x205e891a Module[qwindows.dll]
0x205e0041 Module[qwindows.dll]
0x7a54e61e Module[UIAutomationCore.DLL]
0x7a54b301 Module[UIAutomationCore.DLL]
0x7a5a44fd Module[UIAutomationCore.DLL]
0xee72a97 Module[Qt6Gui.dll]
0x5f8c5360 Module[Qt6Widgets.dll]
0x5f8b8728 Module[Qt6Widgets.dll]
0x5f8b8609 Module[Qt6Widgets.dll]
0x5f8b8609 Module[Qt6Widgets.dll]
0x5f8b8609 Module[Qt6Widgets.dll]
0x5f8b8609 Module[Qt6Widgets.dll]
0x5f8b8609 Module[Qt6Widgets.dll]
0x5f8b8609 Module[Qt6Widgets.dll]
0x5fa4283e Module[Qt6Widgets.dll]
0x5f8b8609 Module[Qt6Widgets.dll]
0x5f8b8609 Module[Qt6Widgets.dll]
0x5f8b8609 Module[Qt6Widgets.dll]
0x5f8b8609 Module[Qt6Widgets.dll]
0x5f8b8609 Module[Qt6Widgets.dll]
0x5f8b8609 Module[Qt6Widgets.dll]
0x5f8b8609 Module[Qt6Widgets.dll]
0x5f8b8609 Module[Qt6Widgets.dll]
0x5f8b8609 Module[Qt6Widgets.dll]
0x5f8b8609 Module[Qt6Widgets.dll]
0x5f8b8609 Module[Qt6Widgets.dll]
0x5f8b8609 Module[Qt6Widgets.dll]
0x5f8b8609 Module[Qt6Widgets.dll]
0x5f8b8609 Module[Qt6Widgets.dll]
0x5f8c4a98 Module[Qt6Widgets.dll]
0x4148668c Module[InstaMAT Studio.exe]
0x41485797 Module[InstaMAT Studio.exe]
0x5eb7bc1b Module[Qt6Core.dll]
0x5eb7e8b4 Module[Qt6Core.dll]
0x5fa4b18b Module[Qt6Widgets.dll]
0x5f8b6ca1 Module[Qt6Widgets.dll]
0x5f871f4e Module[Qt6Widgets.dll]
0x5f86fab3 Module[Qt6Widgets.dll]
0x5eb3b57f Module[Qt6Core.dll]
0x5f8d6ccd Module[Qt6Widgets.dll]
0x5f871f4e Module[Qt6Widgets.dll]
0x5f871071 Module[Qt6Widgets.dll]
0x5eb3b57f Module[Qt6Core.dll]
0xeb24acd Module[Qt6Gui.dll]
0xeb81e9a Module[Qt6Gui.dll]
0x5ecc3020 Module[Qt6Core.dll]
0xee15169 Module[Qt6Gui.dll]
0x5eb42e0f Module[Qt6Core.dll]
0x5eb38b0d Module[Qt6Core.dll]
0x4150f9b0 Module[InstaMAT Studio.exe]
0x4150dd5f Module[InstaMAT Studio.exe]
0x415104e0 Module[InstaMAT Studio.exe]
0x419daced Module[InstaMAT Studio.exe]
0x419d951a Module[InstaMAT Studio.exe]
0x9e7ce957 Module[KERNEL32.DLL]
0xa0a2427c Module[ntdll.dll]

Here’s the minidump contents as well:

`` *******************************************************************************

                   Exception Analysis                                   *

KEY_VALUES_STRING: 1

Key  : AV.Type
Value: Read

Key  : Analysis.CPU.mSec
Value: 765

Key  : Analysis.Elapsed.mSec
Value: 9329

Key  : Analysis.IO.Other.Mb
Value: 0

Key  : Analysis.IO.Read.Mb
Value: 1

Key  : Analysis.IO.Write.Mb
Value: 75

Key  : Analysis.Init.CPU.mSec
Value: 468

Key  : Analysis.Init.Elapsed.mSec
Value: 20870

Key  : Analysis.Memory.CommitPeak.Mb
Value: 179

Key  : Analysis.Version.DbgEng
Value: 10.0.29507.1001

Key  : Analysis.Version.Description
Value: 10.2511.5.1 amd64fre

Key  : Analysis.Version.Ext
Value: 1.2511.5.1

Key  : Failure.Bucket
Value: INVALID_POINTER_READ_c0000005_Qt6Widgets.dll!QWidget::windowHandle

Key  : Failure.Exception.Code
Value: 0xc0000005

Key  : Failure.Exception.IP.Address
Value: 0x7ffc5f8cecb0

Key  : Failure.Exception.IP.Module
Value: Qt6Widgets

Key  : Failure.Exception.IP.Offset
Value: 0x6ecb0

Key  : Failure.Hash
Value: {4063277a-764e-5d17-4620-78d164594929}

Key  : Failure.ProblemClass.Primary
Value: INVALID_POINTER_READ

Key  : Faulting.IP.Type
Value: Paged

Key  : Timeline.OS.Boot.DeltaSec
Value: 13771

Key  : Timeline.Process.Start.DeltaSec
Value: 1174

Key  : WER.OS.Branch
Value: ge_release

Key  : WER.OS.Version
Value: 10.0.26100.1

Key  : WER.Process.Version
Value: 3.1.0.0

FILE_IN_CAB: Minidump.dmp

CONTEXT: (.ecxr)
rax=0000000000000000 rbx=0000000000000000 rcx=0000000000000000
rdx=0000019fa8a4a4f0 rsi=0000019f27e2cbe0 rdi=0000019f5a8f7460
rip=00007ffc5f8cecb0 rsp=0000000b756fa418 rbp=0000000000000000
r8=0000000000000018 r9=0000019ff6333888 r10=00000000800017a0
r11=0000000b756fa420 r12=0000000000000000 r13=0000000000000003
r14=0000000b756fa510 r15=0000000000000000
iopl=0 nv up ei pl zr na po nc
cs=0033 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00010246
Qt6Widgets!QWidget::windowHandle:
00007ffc5f8cecb0 488b4108 mov rax,qword ptr [rcx+8] ds:0000000000000008=???
Resetting default scope

EXCEPTION_RECORD: (.exr -1)
ExceptionAddress: 00007ffc5f8cecb0 (Qt6Widgets!QWidget::windowHandle)
ExceptionCode: c0000005 (Access violation)
ExceptionFlags: 00000000
NumberParameters: 2
Parameter[0]: 0000000000000000
Parameter[1]: 0000000000000008
Attempt to read from address 0000000000000008

PROCESS_NAME: InstaMAT Studio.exe

READ_ADDRESS: 0000000000000008

ERROR_CODE: (NTSTATUS) 0xc0000005 - The instruction at 0x%p referenced memory at 0x%p. The memory could not be %s.

EXCEPTION_CODE_STR: c0000005

EXCEPTION_PARAMETER1: 0000000000000000

EXCEPTION_PARAMETER2: 0000000000000008

STACK_TEXT:
0000000b756fa418 00007ffc5faff7e6 0000000b756fa420 00007ffd205e891a 0000000b756fa450 00007ffd205e0041 0000000b756fa480 00007ffd7a54e61e 0000000b756fa4e0 00007ffd7a54b301 0000000b756fa650 00007ffd7a5a44fd 0000000b756fa780 00007ffd0ee72a97 0000000b756fa8a0 00007ffc5f8c5360 0000000b756fa8d0 00007ffc5f8b8728 0000000b756fa980 00007ffc5f8b8609 0000000b756fa9d0 00007ffc5f8b8609 0000000b756faa20 00007ffc5f8b8609 0000000b756faa70 00007ffc5f8b8609 0000000b756faac0 00007ffc5f8b8609 0000000b756fab10 00007ffc5f8b8609 0000000b756fab60 00007ffc5fa4283e 0000000b756fabb0 00007ffc5f8b8609 0000000b756fabe0 00007ffc5f8b8609 0000000b756fac30 00007ffc5f8b8609 0000000b756fac80 00007ffc5f8b8609 0000000b756facd0 00007ffc5f8b8609 0000000b756fad20 00007ffc5f8b8609 0000000b756fad70 00007ffc5f8b8609 0000000b756fadc0 00007ffc5f8b8609 0000000b756fae10 00007ffc5f8b8609 0000000b756fae60 00007ffc5f8b8609 0000000b756faeb0 00007ffc5f8b8609 0000000b756faf00 00007ffc5f8b8609 0000000b756faf50 00007ffc5f8b8609 0000000b756fafa0 00007ffc5f8b8609 0000000b756faff0 00007ffc5f8c4a98 0000000b756fb040 00007ff64148668c 0000000b756fb0a0 00007ff641485797 0000000b756fb140 00007ffc5eb7bc1b 0000000b756fb190 00007ffc5eb7e8b4 0000000b756fb2d0 00007ffc5fa4b18b 0000000b756fb300 00007ffc5f8b6ca1 0000000b756fb430 00007ffc5f871f4e 0000000b756fb510 00007ffc5f86fab3 0000000b756fb540 00007ffc5eb3b57f 0000000b756fb9f0 00007ffc5f8d6ccd 0000000b756fba60 00007ffc5f871f4e 0000000b756fbb80 00007ffc5f871071 0000000b756fbbb0 00007ffc5eb3b57f 0000000b756fc060 00007ffd0eb24acd 0000000b756fc0d0 00007ffd0eb81e9a 0000000b756fc1c0 00007ffc5ecc3020 0000000b756fc1f0 00007ffd0ee15169 0000000b756ff380 00007ffc5eb42e0f 0000000b756ff3b0 00007ffc5eb38b0d 0000000b756ff450 00007ff64150f9b0 0000000b756ff4b0 00007ff64150dd5f 0000000b756ff910 00007ff6415104e0 0000000b756ff940 00007ff6419daced 0000000b756ffb20 00007ff6419d951a 0000000b756ffbb0 00007ffd9e7ce957 0000000b756ffbf0 00007ffda0a2427c 0000000b756ffc20 0000000000000000 : 0000000000000000 0000000b756fa510 0000000000000003 0000000000000000 : Qt6Widgets!QWidget::windowHandle
: 0000019fa7933d30 0000019fa7933d30 0000019f27e2cbe0 0000019f5a8f7460 : Qt6Widgets!QAccessibleWidget::window+0x36
: 00007ffd7a7a8998 0000000b00000000 0000019f49c21da0 00007ff642f36bf0 : qwindows!qt_plugin_query_metadata_v2+0x86c3a
: 0000019e892eb270 0000000b756fa5e0 0000000b756fa788 0000000b756fa690 : qwindows!qt_plugin_query_metadata_v2+0x7e361
: 0000019f00000022 0000019f27e2cbf8 00007ffd7a83e210 0000000000000000 : UIAutomationCore!UiaNodeFactory::FromLocalProvider+0x136
: 0000000000000000 0000000000240522 0000019e00000000 0000000000000000 : UIAutomationCore!EventMap::AddEntry+0xb1
: 0000000b756fa938 00003d9ca38f8a05 0000000b756fa938 0000000000000001 : UIAutomationCore!UiaRaiseAutomationEvent+0x2ad
: 0000019f27e2ca20 0000019f27e2ca20 0000019f27e2ca20 000001a32c5075d0 : Qt6Gui!QAccessible::updateAccessibility+0xf7
: 0000000000000000 0000019f27e2ca20 0000019e830585a0 00007ffc00000000 : Qt6Widgets!QWidget::setFocus+0x330
: 00007ffd0f0caa00 0000000000000000 0000000000000001 0000019effffffff : Qt6Widgets!QWidget::focusNextPrevChild+0x168
: 0000000b756fb060 0000003800000002 0000000000000001 000000f100000292 : Qt6Widgets!QWidget::focusNextPrevChild+0x49
: 0000000000000000 0000000000000000 0000000000000001 00007ffc5eb3ea07 : Qt6Widgets!QWidget::focusNextPrevChild+0x49
: 0000019f27e2ca20 0000019eb8457150 0000000000000001 0000000b756fb060 : Qt6Widgets!QWidget::focusNextPrevChild+0x49
: 0000000000000000 00007ffc5f871071 0000000000000001 0000000b756fac20 : Qt6Widgets!QWidget::focusNextPrevChild+0x49
: 000000c50000024f 0000019fe9cf9330 0000000000000001 0000011800000005 : Qt6Widgets!QWidget::focusNextPrevChild+0x49
: 0000000000000000 000001a1483e8cf0 000001a05aada130 00007ffc5f8b2541 : Qt6Widgets!QWidget::focusNextPrevChild+0x49
: 0000000000000000 ffffff8800000000 0000000000000000 000001e40000029e : Qt6Widgets!QScrollArea::focusNextPrevChild+0xe
: 000001a05aada130 00007ffc5f8b2541 0000000000000001 000001a05aada130 : Qt6Widgets!QWidget::focusNextPrevChild+0x49
: 0000000000000000 0000000b756fad90 0000000000000001 0000019e8962e9b0 : Qt6Widgets!QWidget::focusNextPrevChild+0x49
: 0000000000000000 000001e4000002a9 0000000000000001 0000019e89388d90 : Qt6Widgets!QWidget::focusNextPrevChild+0x49
: 0000016500000255 0000019e896c7300 0000000000000001 0000000000000000 : Qt6Widgets!QWidget::focusNextPrevChild+0x49
: 0000000000000001 0000019e89388d90 0000000000000001 00007ffc5f8b2541 : Qt6Widgets!QWidget::focusNextPrevChild+0x49
: 0000000000000000 0000019e895a36f0 0000000000000001 0000000b756faee0 : Qt6Widgets!QWidget::focusNextPrevChild+0x49
: 0000000000000005 0000000000000001 0000000000000001 000001e4000002ab : Qt6Widgets!QWidget::focusNextPrevChild+0x49
: 0000019e881d6ea0 00007ffc5f8b2541 0000000000000001 0000019e881d6ea0 : Qt6Widgets!QWidget::focusNextPrevChild+0x49
: 000001a037193d20 00007ffc5f8bbac1 0000000000000001 0000000b756fb048 : Qt6Widgets!QWidget::focusNextPrevChild+0x49
: 0000019fa7931ed0 0000019e830585a0 0000000000000001 00007ffc5f8763ec : Qt6Widgets!QWidget::focusNextPrevChild+0x49
: 0000000000000000 0000000000000000 0000000000000001 0000000000000000 : Qt6Widgets!QWidget::focusNextPrevChild+0x49
: 000001a32c5075d0 0000019eb83fcb20 0000000000000001 0000019f27e2ca20 : Qt6Widgets!QWidget::focusNextPrevChild+0x49
: 00007ffd0f0caa00 0000019eb83fcb20 0000000000000001 0000000b756fb060 : Qt6Widgets!QWidget::focusNextPrevChild+0x49
: 0000019f27e2ca20 000001bf0000072a 0000019e830585a0 000000330000024a : Qt6Widgets!QWidget::focusNextPrevChild+0x49
: 0000000000000001 0000000000000000 0000000000000000 0000000000000000 : Qt6Widgets!QWidgetPrivate::setEnabled_helper+0x118
: 0000000000000002 0000019fa7933a30 00007ff641486a90 0000000b756fb269 : InstaMAT_Studio+0x16668c
: 0000019fa7933a30 0000019fa79334c0 0000019fa79334c0 0000000000000000 : InstaMAT_Studio+0x165797
: 000001a32c5075d0 0000019f00000007 0000000000000007 0000000000000001 : Qt6Core!QObject::qt_static_metacall+0x17ab
: 0000000000000001 0000000b756fb3c9 0000000b756fc150 0000000000000000 : Qt6Core!QMetaObject::activate+0x84
: 0000019e888b4310 00007ffd0eb7f1c3 000001a32c5075d0 00007ffc5f8b9840 : Qt6Widgets!QAbstractSpinBox::keyPressEvent+0x14b
: 0000019eb8421d30 0000019eb8457150 0000019eb8421d30 000001a32c5075d0 : Qt6Widgets!QWidget::event+0x251
: 0000000000000001 0000000b756fb640 0000019f15d3bb70 0000019eb8421d30 : Qt6Widgets!QApplicationPrivate::notify_helper+0x10e
: 0000019eb844b220 000001a32c5075d0 0000000b756fc150 0000019f01000000 : Qt6Widgets!QApplication::notify+0x303
: 0000000000000000 00007ffc5ec3c588 000001a32c5075d0 00007ffc5eb445ac : Qt6Core!QCoreApplication::notifyInternal2+0x11f
: 0000019eb8421d30 0000019eb8457150 0000019eb8421d30 0000019f5a8f7460 : Qt6Widgets!QWidgetRepaintManager::updateStaticContentsSize+0xcad
: 0000000001000004 0000000b756fbcb0 0000000000000000 0000019eb8421d30 : Qt6Widgets!QApplicationPrivate::notify_helper+0x10e
: 0000019eb844b220 0000019f5a8f7460 0000000b756fc150 0000019f01000000 : Qt6Widgets!QApplication::notify+0x18c1
: 0000019f09e347a0 0000000000000001 0000019f09e347a0 0000000b756fc2f0 : Qt6Core!QCoreApplication::notifyInternal2+0x11f
: 00000000000000a4 0000019eb8464a40 0000000000000003 0000000000000000 : Qt6Gui!QGuiApplicationPrivate::processKeyEvent+0x12d
: 00000000000000a4 0000019f5996a7b0 0000019f5996a7b0 00000000000000a4 : Qt6Gui!QWindowSystemInterface::sendWindowSystemEvents+0xea
: 0000000000000000 0000000000000000 0000019f5996a7b0 0000019eb8464a40 : Qt6Core!QEventDispatcherWin32::processEvents+0x90
: 0000000000000080 0000000000000080 0000019f5996a7b0 0000019eb8421d30 : Qt6Gui!QWindowsGuiEventDispatcher::processEvents+0x19
: 0000000b756ff470 0000019eb83fcb20 0000019eb83fcb20 0000000b756ff5b0 : Qt6Core!QEventLoop::exec+0x19f
: 00000000ffffffff 0000019efadc3f40 0000019eff16e040 0000019efadc4140 : Qt6Core!QCoreApplication::exec+0x15d
: 0000019eb844b6a0 0000000000000001 0000019eb844b6a0 0000000b756ffa40 : InstaMAT_Studio+0x1ef9b0
: 0000019eb840d770 0000019eb840d7b0 0000019eb840d830 0000000000000000 : InstaMAT_Studio+0x1edd5f
: 0000000000000000 0000019eb8457480 0000019eb8425ed0 0000000000000001 : InstaMAT_Studio+0x1f04e0
: 0000000000000001 0000000000000000 0000019eb844b6a0 0000019eb8425ed0 : InstaMAT_Studio+0x6baced
: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 : InstaMAT_Studio+0x6b951a
: 0000000000000000 0000000000000000 000004f0fffffb30 000004d0fffffb30 : kernel32!BaseThreadInitThunk+0x17
: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 : ntdll!RtlUserThreadStart+0x2c

IP_IN_PAGED_CODE:
Qt6Widgets!QWidget::windowHandle+0
00007ffc`5f8cecb0 488b4108 mov rax,qword ptr [rcx+8]

SYMBOL_NAME: Qt6Widgets!QWidget::windowHandle+b756fa410

MODULE_NAME: Qt6Widgets

IMAGE_NAME: Qt6Widgets.dll

STACK_COMMAND: ~54s; .ecxr ; kb

FAILURE_BUCKET_ID: INVALID_POINTER_READ_c0000005_Qt6Widgets.dll!QWidget::windowHandle

OS_VERSION: 10.0.26100.1

BUILDLAB_STR: ge_release

OSPLATFORM_TYPE: x64

OSNAME: Windows 10

IMAGE_VERSION: 6.6.3.0

FAILURE_ID_HASH: {4063277a-764e-5d17-4620-78d164594929}

Followup: MachineOwner
--------- ``

debe · June 10, 2026, 10:03am

Hello @WigglyPigglyVRC, welcome to our community and thank you for the report!

Was there anything specific you were doing when the crash happened, or was it “out of nowhere”?

Thanks!