There are a few things to check. If your model crashed right away, the first thing to check is your geometry. If there are any triangles that are really, really long and thin, these are likely the culprits. Highight a component in the component list, an...

If your particles seem to explode from the base of your injection box, it means that the injection box is too close to the belt. Particles that are piling up on the belt are entering the injection box from the outside. The new engine does not detect colli...