problem with OBJ file

[elyonardo]

Hi guys!
I'm looking for some tips about obj files.
The example "RecordPointCloud" generates an obj files for each frame and if I import them in Blender I can see the point cloud correctly (even if the image is curiously rotate, but that's ok).
But, if I use a simple code to import OBJ in Processing to view point cloud (and modify it changing color, for example) it doesn't show me nothing.
Thinking that the problem was my code, I tried to import an OBJ file make in ThinkerCAD, but with it the importer works correctly.

This is the importer OBJ code:

PShape s;

void setup() {
  size(1024, 768, P3D);
  // The file "bot.obj" must be in the data folder
  // of the current sketch to load successfully
  s = loadShape("frame00.obj");
}

void draw() {
  background(0);
  translate(width/2, height/2);
  shape(s, 0, 0);
}

My question is: why I can't import OBJ files made with RecordPointCloud in Processing? Can anyone help me?

Thanks!