Steam Base Game Unlock - Exception

[Spikey00]

 24/08/2010 12:45:24 PM (3.1.2.0Trial)
-----------------------------------Application_ThreadException-----------------------------------System.Exception: Could not find sound 'TabChange'
   at AIWar.GameForm.PlaySound(String Filename, SoundType Type) in C:\vcprojs\AIWar\GameFormParts\Startup.cs:line 2840
   at AIWar.Windows.LicenseKey.btnSave_Click(Object sender, EventArgs e) in C:\vcprojs\AIWar\Windows\LicenseKey.cs:line 72
   at System.Windows.Forms.Control.OnClick(EventArgs e)
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.Label.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)


Friend and I are having issues with Steam and AI War recently; he had to reinstall the game because he had the "missing model/pink squares", probably from a corrupt install, though his game was able to run and join mine for a few minutes before he crashed.  The above exception is after he tried to reinstall and unlock the base game.

We are now trying it without Steam, even though he could run the game fine previously.

EDIT:  I see that a similar occurrence of this has happened.

[CogDissident]

Pink squares can come from version conflicts too, make sure both of you are updated.

[Spikey00]

We were using the latest beta (I was fine, hosting).

The non-Steam copy seems to have worked.

[keith.lamothe]

The error is from it not being able to find the sound effect that is played when you click a button.  This represents a fairly significant problem with the installation   Is the non-Steam copy you're using a separate installation (I assume it is, unless you just removed the vendor.dat file in your steam install)?  If so it's probably just the case that the non-steam install actually has the audio files it's supposed to have.

[Spikey00]

It is an individual installation; Steam version was also removed in case.

I'm curious to know why various parts of the game are corrupt or non-existent.