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Unexpected error occured problem
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I'm getting a similar problem to many other people except nothing I do seems to help.

The log that is produced isn't help to me. Please help if you can.

Arma 3 Launcher Exception Log

Arma 3 Launcher has encountered an unexpected error described below.
Sorry for the inconvenience.
Please report this on Arma 3 Feedback Tracker ( Thanks to you we may fix the issue faster!

System information

Date: 2016-06-13 10:51:43 / 2016-06-13 20:51:43 +10
Current dir: E:\Steam\steamapps\common\Arma 3
AppData dir: C:\Users\Axe\AppData\Local
Command line: "E:\Steam\steamapps\common\Arma 3\arma3launcher.exe"
CLR version: 4.0.30319.42000
OS Version: 10.0.10586.0 (Microsoft Windows NT 10.0.10586.0)
OS 64 bit: True
Process 64 bit: False
Personal dir: C:\Users\Axe\Documents
Culture: en-AU
UI Culture: en-GB
Point of log: Unhandled Exception


System.IO.FileNotFoundException: Could not load file or assembly 'UIAutomationTypes, Version=, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.
File name: 'UIAutomationTypes, Version=, Culture=neutral, PublicKeyToken=31bf3856ad364e35'
at Launcher.Program.StartGui(InitArgs param)
at Launcher.Program.HandleCommandLine()
at Launcher.Program.RunLauncher()
at Launcher.Program.Main(String[] args)

WRN: Assembly binding logging is turned OFF.
To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1.
Note: There is some performance penalty associated with assembly bind failure logging.
To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog].

Modules and assemblies

  • mscorlib, Version=, Culture=neutral, PublicKeyToken=b77a5c561934e089; C:/Windows/Microsoft.NET/Framework/v4.0.30319/mscorlib.dll
  • arma3launcher, Version=, Culture=neutral, PublicKeyToken=null; E:\Steam\steamapps\common\Arma 3\arma3launcher.exe
  • log4net, Version=, Culture=neutral, PublicKeyToken=669e0ddf0bb1aa2a; E:\Steam\steamapps\common\Arma 3\Launcher\log4net.dll
  • System, Version=, Culture=neutral, PublicKeyToken=b77a5c561934e089; C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System/v4.0_4.0.0.0__b77a5c561934e089/System.dll
  • System.Configuration, Version=, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a; C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Configuration/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll
  • System.Core, Version=, Culture=neutral, PublicKeyToken=b77a5c561934e089; C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Core/v4.0_4.0.0.0__b77a5c561934e089/System.Core.dll
  • System.Xml, Version=, Culture=neutral, PublicKeyToken=b77a5c561934e089; C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Xml/v4.0_4.0.0.0__b77a5c561934e089/System.Xml.dll
  • SharedResources, Version=, Culture=neutral, PublicKeyToken=null; E:\Steam\steamapps\common\Arma 3\Launcher\SharedResources.dll
  • PresentationFramework, Version=, Culture=neutral, PublicKeyToken=31bf3856ad364e35; C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/PresentationFramework/v4.0_4.0.0.0__31bf3856ad364e35/PresentationFramework.dll
  • WindowsBase, Version=, Culture=neutral, PublicKeyToken=31bf3856ad364e35; C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/WindowsBase/v4.0_4.0.0.0__31bf3856ad364e35/WindowsBase.dll
  • PresentationCore, Version=, Culture=neutral, PublicKeyToken=31bf3856ad364e35; C:/WINDOWS/Microsoft.Net/assembly/GAC_32/PresentationCore/v4.0_4.0.0.0__31bf3856ad364e35/PresentationCore.dll
  • System.Xaml, Version=, Culture=neutral, PublicKeyToken=b77a5c561934e089; C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Xaml/v4.0_4.0.0.0__b77a5c561934e089/System.Xaml.dll
  • Utils, Version=, Culture=neutral, PublicKeyToken=null; E:\Steam\steamapps\common\Arma 3\Launcher\Utils.dll

Assembly resolution

Resolving UIAutomationTypes, Version=, Culture=neutral, PublicKeyToken=31bf3856ad364e35
requested by: unknown
not resolved


Operating System
Windows 10 x64
Steps To Reproduce

Can not run arma 3 through the launcher.

I can run it through the direct .exe

Additional Information

I have tried all the work arounds suggested on the internet to no avail.

I have gone through tedium to ensure my graphics card is up to date and that my .NET framework is the latest version.

unsure what to do. the log does not provide much instruction to a person with limited experience in dealing with such issues.

Event Timeline

Stens created this task.Jun 14 2016, 8:50 AM
razazel assigned this task to BISWizard.Jun 14 2016, 4:22 PM
razazel changed the task status from New to Assigned.

you are missing one of the files Launcher needs to run. The missing file is part of Microsoft .NET Framework. Please try to re-install the latest .NET Framework: that should fix you issue.

Ticket can be closed, as it's not valid anymore.

BIS_fnc_KK closed this task as Resolved.Dec 29 2019, 1:01 PM
BIS_fnc_KK changed Resolution from Open to Fixed.