make sure to test it with a file that works on every machine. Maybe your B3D file isn0t totally perfect. Maybe you have replaced your hardware/driver/compiler version. In some rare cases a B3D file may work on one machine and won't work on another machine. If somthing's wrong with it and it cannot be loaded successfully then blitz will also return zero.
EG:
A surface with more than 33000 triangles may work on some systems only. (Use a max of signed 16 bit values for tris and verts)
EG:
A surface with more than 33000 triangles may work on some systems only. (Use a max of signed 16 bit values for tris and verts)