Ole
Just want to let you know that in Houdini 11.0.744, each frame starts a separate instance of Maxwell Render for every frame, and every instance renders the sequence submitted. So if you submit 200 frames, 200 instances of Maxwell render will render 200 frames. My computer started glowing.
This is really a bug in the plug-in, soho calls the render in each frame and the plug-in opens Maxwell by each soho call. The fix will be available in the next release within two weeks I guess. Let me know if you need it before that and I can send it in private.