Triangular mesh (.obj)?

Hi there,
I am pretty new to Rhino. I made a model and I want to save the obj file of it having only triangular meshes. I perform the _TriangulateMesh command and I think it works, but then when I open the obj file some faces are formed by more than 3 vertexes.

Hi - in the export settings for OBJ, you need to make sure to uncheck the Create NGons option:


It worked! Thanks!