Well, the problem is not fixed. It’s just inconsistent plotting on my MAC. Sometimes it will stop while plotting my stipple file. I can then go manually control the plotter through inkscape and it works fine. I start it again and it may or may not complete. Small things seem to print fine. I don’t have any problems on Windows. The plotting completes every time. I also do not think it is my MAC or its USB ports (I’ve used different ones). Nothing else connected has any issues.