ERROR: NULL DOMAIN POINTER
 

Hello, I'm modelling a wind flow simulation around the building. The modelling and meshing in Gambit is fine and the mesh file is exported to fluent sucessfully. Even the grid check is fine in Fluent. The main problem arise after iterating for a certain interval and when I want to save the file. It give Error: Null Domain Pointer and I have to close the Fluent without saving the file. I even tried with some fine mesh in Gambit and getting the same error message in Fluent. Could anyone please let me know about this. Regards, VINOD