A problem in a Fluent case after I created the interface
 

Hello All:

I have a problem in a Fluent case after I created the interface between inner and outer cylindrical domains.
The mesh for the rotor domain and the outer domain in term of determination, Angle, Skewness and Aspect ration were very good.
I First read domains with no problems, then, I created the interface (Non-Conformal but matched surfaces) between the inner and outer domains and saved the case. However, after I opened the case again I will have an error says
(Error: Zone 70: reading (171750) number of elements (nodes+cells).)

I then tried to use the same number of elements on both surfaces and also tried assigning more elements to the outer surface but still have the same error (with different zone and elements number.

I have spent quite long time in meshing and trying to solve this problem but with no success.

Please Please if you have any suggestion I am really thankful for that.

Best Regards,
Aziz