Very Odd Loading Problem

[N.P.C.]

I have created a map, a death match one actually and was just testing some bits of it and they compiled, loaded and played fine then I added an env_cubemap to the maps water to make it render properly and suddenly the map compiles but then while trying to run it Half Life 2 DM makes the sound of a Critical Stop in windows sound scheme the crashes, I am at a loss to explain why. When I usually run HL2 DM for my custom maps the error box looks like this:

But I don’t know why it occurs or whether it’s causing this crashing.

Any help would be appreciated, Thanks.

 

[Ti133700N]

That's because the parameter is incorect!!! The simplest way to get rid of those critical errors is to start back from an earlier version of your map. If you haven't saved on several names then you'll learn to do it, I don't know why Hammer doesn't have an increment on save feature but anyway...

You can also check for problems (ALT+P). If there are none read carefully the compile log, there are often clues (like warnings) on what could cause troubles like that.