Nevermind! I figured it out: I had the box "UCI 960" or so ticked. Unticked the box in the engine options and now it works fine.

I just downloaded Critter 1.6 and tested it on a few games. To my astonishment, it could never castle. Instead of moving the king next to the rook, it wants to "eat" the rook with the king and therefore make an illegal move and then crashes instantly.
I attach a screenshot of a position in which ...

Thank you very much, I just tried with Houdini 1.5a and after putting all the gaviota tablebases inside the same folder, it works.
I did not dowloaded that engine at first because I had read it was significantly weaker than the 1.5 version. But it doesn't matter that much to me, the egtb working ...

Hi and thanks for the fast reply! Open the engine configuration page (Ctrl+1) and set GaviotaTbPath to the location of the tablebases. I already tried this, this is what I meant by "In the configuration of the engine I specified the path to the gaviota 3-men egtb".
My path is C:\Documents and ...

Hi guys,
I've downloaded Houdini 1.5 and Arena 3.0.
I have downloaded all the 3-men egtb, most of the 4 and 5 too. However when I set any position with 3 pieces, Houdini never uses the gaviota egtb. For example it would take it a few seconds of thinking to find the checkmate of k+r vs k; it never ...