I receive Unhandled exception error dialog box ...

I click details button and it says this :

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

************** Exception Text **************
System.ComponentModel.Win32Exception: The system cannot find the file specified
at System.Diagnostics.Process.StartWithShellExecuteEx(ProcessStartInfo startInfo)
at System.Diagnostics.Process.Start()
at System.Diagnostics.Process.Start(ProcessStartInfo startInfo)
at System.Diagnostics.Process.Start(String fileName)
at WUD.formMain.toolStripButtonAddUL_Click(Object sender, EventArgs e)
at System.Windows.Forms.ToolStripItem.RaiseEvent(Object key, EventArgs e)
at System.Windows.Forms.ToolStripButton.OnClick(EventArgs e)
at System.Windows.Forms.ToolStripItem.HandleClick(EventArgs e)
at System.Windows.Forms.ToolStripItem.HandleMouseUp(MouseEventArgs e)
at System.Windows.Forms.ToolStripItem.FireEventInteractive(EventArgs e, ToolStripItemEventType met)
at System.Windows.Forms.ToolStripItem.FireEvent(EventArgs e, ToolStripItemEventType met)
at System.Windows.Forms.ToolStrip.OnMouseUp(MouseEventArgs mea)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
at System.Windows.Forms.ToolStrip.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)


************** Loaded Assemblies **************
mscorlib
Assembly Version: 2.0.0.0
Win32 Version: 2.0.50727.42 (RTM.050727-4200)
CodeBase: file:///C:/WINNT/Microsoft.NET/Framework/v2.0.50727/mscorlib.dll
----------------------------------------
WUD
Assembly Version: 2.23.842.0
Win32 Version: 2.23.842.0
CodeBase: file:///C:/Program%20Files/Windows%20Updates%20Downloader/WUD.exe
----------------------------------------
System.Windows.Forms
Assembly Version: 2.0.0.0
Win32 Version: 2.0.50727.42 (RTM.050727-4200)
CodeBase: file:///C:/WINNT/assembly/GAC_MSIL/System.Windows.Forms/2.0.0.0__b77a5c561934e089/System.Windows.Forms.dll
----------------------------------------
System
Assembly Version: 2.0.0.0
Win32 Version: 2.0.50727.42 (RTM.050727-4200)
CodeBase: file:///C:/WINNT/assembly/GAC_MSIL/System/2.0.0.0__b77a5c561934e089/System.dll
----------------------------------------
System.Drawing
Assembly Version: 2.0.0.0
Win32 Version: 2.0.50727.42 (RTM.050727-4200)
CodeBase: file:///C:/WINNT/assembly/GAC_MSIL/System.Drawing/2.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll
----------------------------------------
ICSharpCode.SharpZipLib
Assembly Version: 0.84.0.0
Win32 Version: 0.84.0.0
CodeBase: file:///C:/Program%20Files/Windows%20Updates%20Downloader/ICSharpCode.SharpZipLib.DLL
----------------------------------------
System.Data
Assembly Version: 2.0.0.0
Win32 Version: 2.0.50727.42 (RTM.050727-4200)
CodeBase: file:///C:/WINNT/assembly/GAC_32/System.Data/2.0.0.0__b77a5c561934e089/System.Data.dll
----------------------------------------
System.Xml
Assembly Version: 2.0.0.0
Win32 Version: 2.0.50727.42 (RTM.050727-4200)
CodeBase: file:///C:/WINNT/assembly/GAC_MSIL/System.Xml/2.0.0.0__b77a5c561934e089/System.Xml.dll
----------------------------------------
System.Configuration
Assembly Version: 2.0.0.0
Win32 Version: 2.0.50727.42 (RTM.050727-4200)
CodeBase: file:///C:/WINNT/assembly/GAC_MSIL/System.Configuration/2.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll
----------------------------------------

************** JIT Debugging **************
To enable just-in-time (JIT) debugging, the .config file for this
application or computer (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 computer
rather than be handled by this dialog box.

Help anyone ?

thanks in advance

Can you say when exactly this error occures? May be I just don't understand...
If you need to OPEN .ul file - try notepad.
If to install to WUD - place it to WUD dir on your HDD & open WUD , try to double-click on file after extracting or something
No answers in this top indicates that nobody ever seen this error...May be you do something wrong?

P.S. Please , describe what are you doing when ulz file downloaded on your machine.

got the same error, until I figured out that the update lists are compressed when downloaded. All I had to do was double click on each download list to extract and the program runs fine now.

Well I thought about it , so asked for details It's all described on this forum , now installation an ULs is much more easy then it was
For example , ENG ULs installs by double-click on them from ANY location on your PC , but RUS ULs which I needed - only if it's placed in WUD dir.

Thanks to EasternShore for his post & it's really interesting , what will author say

UL is the uncompressed update list. ULZ is the compressed update list. When WUD is first run, it is associated with the ULZ file extension so that when you open a ULZ file, it will extract the UL and save it to the WUD program directory.

The point is so that you can just click on the UL you want on the WUD home page, and instead of doing Save As... you choose Open, and the UL will automatically be installed.

mine isn't working that way for some reason. It's been a while since I ran it, but today I noticed the ulz extension wasn't registered to WUD, so I uninstalled and reinstalled WUD. The association was restored, but when WUD opens after running the ulz it still says no update list was found. Seems that the file is being passed into WUD, but it doesn't know what to do with it, so it doesn't act to decompress & create any new ul file.

Make sure after you install a install the ULZ, if WUD is already open, to hit the Refresh button.

Tried that. Still didn't work. I don't believe the ulz is even decompressing, and I know it's not copying the ul to WUD dir, like it's supposed to. I'm running it out of J:\Program Files by the way, which isn't my official Program Files dir (C: partition is too small due to my nLite attempt only half finished - the goal being to seperate the WINDOWS dir from Documents and Settings, Program Files and pagefile.sys as well - a pristine windows partition - FYI), if that has any bearing on the issue...

All my other programs run fine this way so far, I just change C: to J: whenever I install something. this was only intended to be a temporary install for testing my nLite build... moons ago.

Edit:
oh, when I run WUD first before opening the ULZ, a new instance opens up with the not found message and stays open. It's definitely not supposed to do that, I'm sure.

Make sure the ICSharpCode.SharpZipLib.dll binary is in the same folder as WUD.