Gambit problem -2D

Manan

Hi

I am developing a 2D geometry in gambit.Its a simple rectangle with inlet and a outlet.I created the geometry,meshed the edges and the face. Inlet and outlet were given BC as mass flow inlet and outflow. I read in manuals that gambit automatically takes other boundaries as wall and continnum type as fluid. However I am not able to export the mesh into fluent.It gives the following message.

" Warn : Continuum Entity fluid.3 does not contain any valid entity and is not written Warn: Boundary Entity mass_flow_inlet.5 does not contain any valid entity and is not written. .....

No entites were found for mesh export Errors were found during export. Export file was not created "

Any advice on this will be helpful.