Best format to write the meshfile.
 

Which is the best format to write the mesh file to be read in the personal code for structured mesh using ICEM?

We are using CGNS format at present, but I having many issues with even reading mesh for common problems, generated by ICEM. These problems are like, 3d airfoil, 3d cylinder.

So, we are thinking either to use some other format. Or, if any particular procedures has to be followed for writing the cgns file using ICEM.
Ours is structured solver and we can read CGNS 2.4 version.
Please if any body can help.