This will sound stupid...

[Stars]

But when i try to open Source SDK.....

It says "Preparing to launch Source SDK.."

Then that little window closes, nothing else happens.

I opened it the other week, and it was fine...

Any ideas?

 

[Dridmar]

But when i try to open Source SDK.....

It says "Preparing to launch Source SDK.."

Then that little window closes, nothing else happens.

I opened it the other week, and it was fine...

Any ideas?

You can try downloading it over again?

 

[FER]

Happened the same for me

 

[Crow]

Same here

Though it worked for my other account. Dunno wtf is up.

 

[WeissberV]

Mine works normally.

 

[Kh]

you just need to type:
-engine ep1

In your launch option for the sdk