Please remove Private Mobile Base V40/V41 from your systems. A load-error with 'hubsw13' will sooner or later happen. The error can be reproduced as follows: 1 You have saved a game with PMB 4.0 2 Exited Morrowind 3 Activated any other plugin 4 Restarted and loaded the save game with the PMB again. This error seems an internal engine problem. A very tricky one, since V40 runs fine -even with load and save- as long as no new plugin is activated before a load. As to a bugfix: it's most uncertain if anything can be done about it. My suspicions are, that the PMB exceeds some internal engine-limit in dealing with activators. Do not expect any solution (if any) soon.