I'm experiencing an MG3 standalone app launch issue on Win 11

BETA TESTING
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1

Hi I bought a license and the plugins work nicely. V3 standalone won’t launch though, Win 11. I’ve tried the three V3 beta versions on the download page

here’s the contents of the program’s log

MIDI Guitar 3.0.55 - 64-bit
Log started: 11 Sep 2025 12:44:47am

Log file: C:\Users\Rob\AppData\Roaming\JamOrigin\MIDI Guitar Log Standalone.txt
MIDI Guitar 3.0.55
Initializing platform
Initializing plugin formats
Offbeat Engine is ready
User Directory: C:\Users\Rob\AppData\Roaming\JamOrigin
Setup Offbeat Engine
Loading Patch Settings and MIDI Control

and here are the two Event Viewer entries:

  1. Error
    =======
    Faulting application name: MIDI Guitar 3.exe, version: 3.0.55.0, time stamp: 0x6713755a
    Faulting module name: ntdll.dll, version: 10.0.26100.5074, time stamp: 0x0e967e89
    Exception code: 0xc0000005
    Fault offset: 0x0000000000038e9b
    Faulting process id: 0x29F8
    Faulting application start time: 0x1DC22AC6ADF4737
    Faulting application path: C:\Program Files\Jam Origin\MIDI Guitar 3\MIDI Guitar 3.exe
    Faulting module path: C:\WINDOWS\SYSTEM32\ntdll.dll
    Report Id: e307e7ad-b363-4779-8827-e1a6fea4677c
    Faulting package full name:
    Faulting package-relative application ID:

and 2. Information

Fault bucket 1558680259872749714, type 4
Event Name: APPCRASH
Response: Not available
Cab Id: 0

Problem signature:
P1: MIDI Guitar 3.exe
P2: 3.0.55.0
P3: 6713755a
P4: ntdll.dll
P5: 10.0.26100.5074
P6: 0e967e89
P7: c0000005
P8: 0000000000038e9b
P9:
P10:

Attached files:
\?\C:\ProgramData\Microsoft\Windows\WER\Temp\WER.f6638b65-9933-4e7e-a388-230bd59827a7.tmp.dmp
\?\C:\ProgramData\Microsoft\Windows\WER\Temp\WER.4ef9af06-310a-4545-b026-fc9c27400f52.tmp.WERInternalMetadata.xml
\?\C:\ProgramData\Microsoft\Windows\WER\Temp\WER.3e52fe33-5d5e-4731-9324-ec0bab5c242f.tmp.csv
\?\C:\ProgramData\Microsoft\Windows\WER\Temp\WER.62cc669b-9db9-4ba0-9573-ad60a3337ef9.tmp.txt
\?\C:\ProgramData\Microsoft\Windows\WER\Temp\WER.212025ec-d70f-4bb5-96ba-9dc52149c6a2.tmp.xml

These files may be available here:
\?\C:\ProgramData\Microsoft\Windows\WER\ReportArchive\AppCrash_MIDI Guitar 3.ex_ca1c9538ca688b7f0f39ae47219b4365099b7c6_ad3f2e8a_4f427f58-2075-45c7-9841-4fdfbdbb8b8c

Analysis symbol:
Rechecking for solution: 0
Report Id: f79426d1-1eff-4f8e-98f0-71f5581f28b4
Report Status: 268435456
Hashed bucket: dee88a1ea4831e90a5a18b702820f892
Cab Guid: 0

Thanks
Rob

2

Try the following that may assist in rectifying problems with JUCE-based apps like MG3 when they crash early with an ntdll.dll / 0xC0000005-related issue on Windows 11.

  1. Kill any stuck MG3 process
  • Press Ctrl+Shift+Esc → Processes → end any “MIDI Guitar 3.exe”.
  1. Reset MG3’s settings (non-destructive)
  • In "%AppData%\JamOrigin\Preferences", rename MG3’s prefs files (don’t delete—just add “.bak”) so it starts clean. Please check this post – I suspect it may help you: MG3 Windows 11 blank GUI on startup

  1. Also, try starting MG3 with audio/MIDI fully disconnected:

    • Physically unplug USB audio/MIDI devices and close any audio utilities (e.g., Focusrite Control, Nahimic/Sonic Studio, Voicemeeter, ASIO Link).
    • Launch MG3. If it now opens, re-select your device later in Settings. (A lot of early-init crashes are device/driver handshakes.)

3

Thank you. I tried all the step you suggest. No change. All that happens, as yesterday before I tried this, is there’s a momentary flicker of the icon the Win 11 “opening app” spinny animation, then nothing. There were no MG3 processes Here’s the log with my Audio device unplugged and the prefs files renamed to .bak

MIDI Guitar 3.0.55 - 64-bit
Log started: 11 Sep 2025 4:05:46pm

Log file: C:\Users\Rob\AppData\Roaming\JamOrigin\MIDI Guitar Log Standalone.txt
MIDI Guitar 3.0.55
Initializing platform
Initializing plugin formats
Offbeat Engine is ready
User Directory: C:\Users\Rob\AppData\Roaming\JamOrigin
Setup Offbeat Engine
Loading Patch Settings and MIDI Control

Thanks
Rob