Compiler: Unable to open file 'OBJ\WL_AGENT.OBJ' error

Hello, I want to have the Lighting effect:

http://www.wolfenstein3d.co.uk/coding-lighting.htm

( When you walk under a ceiling lamp the screen flashes ? )

But If I want to link the compiler says:

Linker error: Unable to open file 'OBJ\WL_AGENT.OBJ'

What is the problem? I have this:


case bo_gibs:
if (gamestate.health >10)
return;

SD_PlaySound (SLURPIESND);
HealSelf (1);
break;

case bo_light:
StartBonusFlash ();

SD_PlaySound (SLURPIESND);
HealSelf (1);
break;

I have tried many things like this:

case bo_gibs:
if (gamestate.health >10)
return;

SD_PlaySound (SLURPIESND);
HealSelf (1);
break;

case bo_light:
StartBonusFlash ();

But nothing seems to work.. Can anyone help please?

The bottom part;

Code:

[b]SD_PlaySound (SLURPIESND);
HealSelf (1);
break;[/b]


shouldn't be there for starters.

The tutorial looks strange becasue as far as I am aware it requires 2 seperate sprites to flash between;
1. The light when on
2. The light when off
This doesn't appear to be in the tutorial at all.

These might be a bit closer to what you are looking for;
WSJ Animated static objects tutorial
Animated static objects (Improved)

Oh, I thought it was when you go under a ceiling light the screen flashes, and when you are away from it it doesn't flash.

Thanks anyways.