flow simulation solve doesnt work

Hi everyone.

I'm trying to do a flow simulation for an impeller. the solve doesn't work.. it says that the meshing process is interupted and I dont get any reason why.

I'm thinking maybe my computer inst strong enough or something but I want to make sure.

I tried an easier form of the problem in a new assembly and still no go. when I removed the blades of the fan and left only the part of the rotating area it works...

an way I hope  someone can run this in his own computer and tell me whats wrong.

Ben

SolidworksFlow Simulation