Question about the gas turbine simulation

Hello,

I am trying to simulate the fluid flow in gas turbine.

I use a cylinder as the 'Roation region', and the rotation speed is 4000rpm.  The boudary condition as the figure shows, the inlet mass flow is 0.0004kg/s and the outlet is environment pressure, and the blue surface is the inner surface of the casing, which is real wall.

I trying to run it, but it shows 'solver abnormally terminated! please contact the support service'

Is there anything wrong with my model?

Aother question, in fact I want to simulate the Pelton wheel and try to find the torque exerted by the gas stream, what can I do?

Looking forward your help!