.obj export file error

Hi

I’ve a rhino model that im exporting as an .obj then importing into blender. when the file is imported into blender the model basically has no data (no faces verts or tris etc.) when im looking at the the .obj file icon in finder doesnt have the model preview on it either??? what am I doing wrong between model and exporting it as an .obj? is there something I need to package before doing so?