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P3D crash when using vPilot

Luca Donadi

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Hello everyone!

My P3D keeps crashing when I'm on the ground at an airport when vPilot is open... If I'm in the air, no crashes at all...
When I don't use vPilot, I also don't have any crashes... How to resolve this?
Apparently it's a ucrtbase.dll crash (C:\WINDOWS\System32\ucrtbase.dll), but it only happens when vPilot is open...

I'm on the latest vPilot version,
Latest P3D Version,
FSUIPS version 6.0.9

Thanks in advance,

I'm sorry that it's in French...

Nom de l’application défaillante Prepar3D.exe, version :, horodatage : 0x5eebf566
Nom du module défaillant : ucrtbase.dll, version : 10.0.19041.423, horodatage : 0xccf6a09c
Code d’exception : 0xc0000409
Décalage d’erreur : 0x00000000000711e8
ID du processus défaillant : 0x228
Heure de début de l’application défaillante : 0x01d6844eb3c18d1f
Chemin d’accès de l’application défaillante : C:\Program Files\Lockheed Martin\Prepar3D v5\Prepar3D.exe
Chemin d’accès du module défaillant: C:\WINDOWS\System32\ucrtbase.dll
ID de rapport : 588c0393-bdca-4bb8-adc5-dac27f00f008
Nom complet du package défaillant : 


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  • 1 year later...
On 9/6/2020 at 7:59 PM, Ross Carlson said:

Does it crash as soon as you start vPilot, or after some time passes?

Hey Ross,
I'm got the same problem with the FSLabs A320X/A320SL (not tested with A321X & A321SL) after I connect to Vatsim and I want to press a Buton in the FSLabs it crashes on me. 
Event Viewer is giving me this report:

Faulting application name: Prepar3D.exe, version:, time stamp: 0x60db69bf
Faulting module name: ucrtbase.dll, version: 10.0.19041.789, time stamp: 0x2bd748bf
Exception code: 0xc0000409
Fault offset: 0x0000000000071208
Faulting process ID: 0x108e4
Faulting application start time: 0x01d7aca7907cce96
Faulting application path: E:\Prepar3D\Prepar3D.exe
Faulting module path: C:\WINDOWS\System32\ucrtbase.dll
Report ID: 76c7f594-5272-4850-90dd-aa7ce6ae80d4
Faulting package full name: 
Faulting package-relative application ID: 

It only crashes whem I'm using the FSLabs. I've got the QW787's & PMDG777's and they work perfectly fine on Vatsim it's just the FSLabs.

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On 9/18/2021 at 6:44 PM, marek lebek said:


I got the problem with my ptt buton.As soon the v pilot is on the background the ptt button doesn’t work.So I only hear the controller but I can’t talk to him

This is most likely a different issue. If you run your sim "as administrator", vPilot has to be started "as administrator" as well, otherwise PTT will not work when inside the sim.

When starting vPilot, right click on the icon and select "Run as administrator". To permanently run as administrator, right click on the icon, select "Properties", go to the "Compatibility" tab and select "Run this program as an administrator" 

Kind regards,


Nicolas Ammann


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