Null Reference Exception when starting Vault Client

[AStifora]

Hello,
I get a null reference exception when starting the Vault Client.

The exception details are as follows:

See the end of this message for details on invoking
just-in-time (JIT) debugging instead of this dialog box.

************** Exception Text **************
System.NullReferenceException: Object reference not set to an instance of an object.
at VaultGUIClient.FormMain.tabControl_DrawItem(Object sender, DrawItemEventArgs e)
at System.Windows.Forms.TabControl.OnDrawItem(DrawItemEventArgs e)
at System.Windows.Forms.TabControl.WmReflectDrawItem(Message& m)
at System.Windows.Forms.TabControl.WndProc(Message& m)
at System.Windows.Forms.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)


************** Loaded Assemblies **************
mscorlib
Assembly Version: 1.0.5000.0
Win32 Version: 1.1.4322.2032
CodeBase: file:///c:/winnt/microsoft.net/framework/v1.1.4322/mscorlib.dll
----------------------------------------
VaultGUIClient
Assembly Version: 2.0.6.2219
Win32 Version: 2.0.6.2219
CodeBase: file:///C:/Program%20Files/SourceGear/Vault%20Client/VaultGUIClient.exe
----------------------------------------
VaultLib
Assembly Version: 2.0.6.2219
Win32 Version: 2.0.6.2219
CodeBase: file:///C:/Program%20Files/SourceGear/Vault%20Client/VaultLib.DLL
----------------------------------------
VaultPresentationLib
Assembly Version: 2.0.6.2219
Win32 Version: 2.0.6.2219
CodeBase: file:///C:/Program%20Files/SourceGear/Vault%20Client/VaultPresentationLib.DLL
----------------------------------------
VaultClientUILib
Assembly Version: 2.0.6.2219
Win32 Version: 2.0.6.2219
CodeBase: file:///C:/Program%20Files/SourceGear/Vault%20Client/VaultClientUILib.DLL
----------------------------------------
System.Windows.Forms
Assembly Version: 1.0.5000.0
Win32 Version: 1.1.4322.2032
CodeBase: file:///c:/winnt/assembly/gac/system.windows.forms/1.0.5000.0__b77a5c561934e089/system.windows.forms.dll
----------------------------------------
System
Assembly Version: 1.0.5000.0
Win32 Version: 1.1.4322.2032
CodeBase: file:///c:/winnt/assembly/gac/system/1.0.5000.0__b77a5c561934e089/system.dll
----------------------------------------
VaultClientOperationsLib
Assembly Version: 2.0.6.2219
Win32 Version: 2.0.6.2219
CodeBase: file:///C:/Program%20Files/SourceGear/Vault%20Client/VaultClientOperationsLib.DLL
----------------------------------------
System.Xml
Assembly Version: 1.0.5000.0
Win32 Version: 1.1.4322.2032
CodeBase: file:///c:/winnt/assembly/gac/system.xml/1.0.5000.0__b77a5c561934e089/system.xml.dll
----------------------------------------
System.Drawing
Assembly Version: 1.0.5000.0
Win32 Version: 1.1.4322.2032
CodeBase: file:///c:/winnt/assembly/gac/system.drawing/1.0.5000.0__b03f5f7f11d50a3a/system.drawing.dll
----------------------------------------
VaultClientNetLib
Assembly Version: 2.0.6.2219
Win32 Version: 2.0.6.2219
CodeBase: file:///C:/Program%20Files/SourceGear/Vault%20Client/VaultClientNetLib.DLL
----------------------------------------
System.Web.Services
Assembly Version: 1.0.5000.0
Win32 Version: 1.1.4322.2032
CodeBase: file:///c:/winnt/assembly/gac/system.web.services/1.0.5000.0__b03f5f7f11d50a3a/system.web.services.dll
----------------------------------------

************** JIT Debugging **************
To enable just in time (JIT) debugging, the config file for this
application or machine (machine.config) must have the
jitDebugging value set in the system.windows.forms section.
The application must also be compiled with debugging
enabled.

For example:

<configuration>
<system.windows.forms jitDebugging="true" />
</configuration>

When JIT debugging is enabled, any unhandled exception
will be sent to the JIT debugger registered on the machine
rather than being handled by this dialog.

Any assistance with this would be wonderful, as this is basically stopping me from even trying the product out.

Thanks

[lbauer]

We've seen this before but we're not sure what causes it.

Try deleting the Form Main entry in this registry key:
HKEY_CURRENT_USER\Software\SourceGear\Vault\Client\Settings

If that doesn't work, what version of the .NET Framework is installed on the Vault Client machine?