Hi,

I made a 2d quadrilateral mesh in Gambit and defined the edge in my x-axis as the axis boundary.(entity:edge) But after I export the mesh, it said that the axis has no valid entity and is not exported. what did I define uncorrectly? Any help is very grateful.

Regards

if feel the edge selected for making the boundary, may not belong to the face what has mesh, i mean it might happen that u have created some over lying face, since it usually come if the edge u r exporting in mesh doen't have mesh with it (or valid mesh), hope u understand my point, try making other face invisible and selectign the edge again.