[Drillerman]

Hello,
I am grateful if any one can help me.
I make simulation study for a rotatilg tool existing inside pipeline. The tool has Stator and Rotor, through the Rotation of Rotor sinus wave will be generated.
The Simulation was always running without any problem in ANSYS 11.0
As you know windows xp is not more workable, we have to use another windows and thus another ANSYS version, now I use ANSYS 15
The problem: when I try to run the last Simulatuion (cfx model made in ANSYS 11) by using ANSYS 15, I got always this error message:
In Analysis 'Flow Analysis 1' - Domain Interface 'Stator2Rotor2Interface': The interface is placed at a rotor-stator interface and the pitch change option of 'None' has been selected. This option should only be used when the overall extent and shape of each side of the interface perfectly match and the surfaces are aligned with each other. It may therefore be suitable when full 360 degree or exactly equal pitch components are being analyzed.

I have tried to adjust the pitch change to Automatic but the solver has stopped with an ERROR 001100279 , Floating point exception: Zero divide.

I ask if any one can help me and thanks a lot in advance