I installed Arma3 on a new PC (used to play in a different PC years ago)
I got this error:
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 (http://feedback.arma3.com). Thanks to you we may fix the issue faster!
System information
Date: 2025-07-05 18:01:29 / 2025-07-05 23:31:29 +05
Current dir: C:\Program Files (x86)\Steam\steamapps\common\Arma 3
AppData dir: C:\Users\jvbha\AppData\Local
Command line: "C:\Program Files (x86)\Steam\steamapps\common\Arma 3\arma3launcher.exe"
Version: 1.5.152.984
CLR version: 4.0.30319.42000
OS Version: 10.0.26100.0 (Microsoft Windows NT 10.0.26100.0)
OS 64 bit: True
Process 64 bit: False
Personal dir: C:\Users\jvbha\OneDrive\Documents
Culture: en-US
UI Culture: en-US
Point of log: Unhandled Exception
Exception
System.Windows.Markup.XamlParseException: Internal XAML system error: Missing case 'TemplateStarting' in DeferringWriter'WriteEndMember' method. ---> System.Xaml.XamlInternalException: Internal XAML system error: Missing case 'TemplateStarting' in DeferringWriter'WriteEndMember' method.
at System.Xaml.DeferringWriter.WriteEndMember() at System.Xaml.XamlObjectWriter.WriteEndMember() at System.Xaml.XamlWriter.WriteNode(XamlReader reader) at System.Windows.Markup.WpfXamlLoader.TransformNodes(XamlReader xamlReader, XamlObjectWriter xamlWriter, Boolean onlyLoadOneNode, Boolean skipJournaledProperties, Boolean shouldPassLineNumberInfo, IXamlLineInfo xamlLineInfo, IXamlLineInfoConsumer xamlLineInfoConsumer, XamlContextStack`1 stack, IStyleConnector styleConnector) at System.Windows.Markup.WpfXamlLoader.Load(XamlReader xamlReader, IXamlObjectWriterFactory writerFactory, Boolean skipJournaledProperties, Object rootObject, XamlObjectWriterSettings settings, Uri baseUri) --- End of inner exception stack trace --- at System.Windows.Markup.WpfXamlLoader.Load(XamlReader xamlReader, IXamlObjectWriterFactory writerFactory, Boolean skipJournaledProperties, Object rootObject, XamlObjectWriterSettings settings, Uri baseUri) at System.Windows.Markup.WpfXamlLoader.LoadBaml(XamlReader xamlReader, Boolean skipJournaledProperties, Object rootObject, XamlAccessLevel accessLevel, Uri baseUri) at System.Windows.Markup.XamlReader.LoadBaml(Stream stream, ParserContext parserContext, Object parent, Boolean closeStream) at System.Windows.Application.LoadComponent(Object component, Uri resourceLocator) at Launcher.App.InitializeComponent() at Launcher.Program.StartGui(InitArgs param) at Launcher.Program.HandleCommandLine() at Launcher.Program.RunLauncher() at Launcher.Program.Main(String[] args)
Modules and assemblies
- mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089; C:\Windows\Microsoft.NET\Framework\v4.0.30319\mscorlib.dll
- arma3launcher, Version=1.5.152.984, Culture=neutral, PublicKeyToken=null; C:\Program Files (x86)\Steam\steamapps\common\Arma 3\arma3launcher.exe
- log4net, Version=1.2.13.0, Culture=neutral, PublicKeyToken=669e0ddf0bb1aa2a; C:\Program Files (x86)\Steam\steamapps\common\Arma 3\Launcher\log4net.dll
- System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089; C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System\v4.0_4.0.0.0__b77a5c561934e089\System.dll
- System.Configuration, Version=4.0.0.0, 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=4.0.0.0, 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=4.0.0.0, 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=1.5.152.984, Culture=neutral, PublicKeyToken=null; C:\Program Files (x86)\Steam\steamapps\common\Arma 3\Launcher\SharedResources.dll
- PresentationFramework, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35; C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\PresentationFramework\v4.0_4.0.0.0__31bf3856ad364e35\PresentationFramework.dll
- WindowsBase, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35; C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\WindowsBase\v4.0_4.0.0.0__31bf3856ad364e35\WindowsBase.dll
- PresentationCore, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35; C:\WINDOWS\Microsoft.Net\assembly\GAC_32\PresentationCore\v4.0_4.0.0.0__31bf3856ad364e35\PresentationCore.dll
- System.Xaml, Version=4.0.0.0, 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=1.5.152.984, Culture=neutral, PublicKeyToken=null; C:\Program Files (x86)\Steam\steamapps\common\Arma 3\Launcher\Utils.dll
- UIAutomationTypes, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35; C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\UIAutomationTypes\v4.0_4.0.0.0__31bf3856ad364e35\UIAutomationTypes.dll
- UIAutomationProvider, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35; C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\UIAutomationProvider\v4.0_4.0.0.0__31bf3856ad364e35\UIAutomationProvider.dll
- arma3launcher.resources, Version=1.5.152.984, Culture=en-US, PublicKeyToken=null; C:\Program Files (x86)\Steam\steamapps\common\Arma 3\Launcher\en-US\arma3launcher.resources.dll
- SharedResources.resources, Version=1.5.152.984, Culture=en-US, PublicKeyToken=null; C:\Program Files (x86)\Steam\steamapps\common\Arma 3\Launcher\en-US\SharedResources.resources.dll