Ok…
I downloaded 1.5.0-RC1 yesterday and made a little terrain map in it.
I started the compiling and was surprised it was so fast, so i started my ET and used the commands, but it couldnt find terrain2.bsp
I was like WTF and checked in the etmain/maps folder, but nope, it wasnt there. I then checked the path in Radiant, and it was right.
I then tried to compile, with a new compile type, but still the same. I looked in the Consol and saw that it did the two first things ok, but the last one wasnt even wrote down there.
It gave me a file i could go check it. I checked it and it gave me an error. cant remember the error, ill get it on my other comp.