Are you using NWNTX with the optimizations plugin by chance? There is a note on that thread that I think applies to updating haks and reopening the same module:
virusman:
NWNTX Optimizations plugin has always been in experimental state, with this exact limitation: do not load another module when NWNTX Optimizations is running. If you have to switch between modules frequently, either restart the toolset every time or do not use NWNTX Optimizations.
Modifié par pope_leo, 09 août 2013 - 12:48 .