Hello everyone, this weekend I was strugling with the same issue and maybe I have some new thoughts about it… I found one extreamly large mesh in my model, about 500.000 faces, and this was copied a dozen times in the project. After deleting this I got all the computers working fine (Im using four machines). So my sugestions is to look into your model to highly detailed objects, and lets try to validate this solution… Tks everyone for sharing your experiences in ue4, very helpfull.