Unassigned Interference
 

I receive an error "unassigned interface zone detected" while checking the grid in fluent. What does this mean and what should I do? any ideas?
Moreover, when I import my MESH in fluent, it duplicates the interface and creates a wall boundary lying on it. Does this affect the solution?

THANKS

in Gambit you defined Interfaces.
After importing your mesh in Fluent, you have to define the couple of interfaces (define/interface)