Kerbal Space Program

When waiting for my command module to come back around for a rendezvous, just as the command module is loaded in I get 2 errors : Error: Module ModuleRCSFX threw during OnStart: System.NullReferenceException and Error: Module ModuleRCSFX threw during ONStartFinished: System.NullReferenceException: Object reference not set to an instance of an object.

When this happens I am unable to save the game, go back to the ksc, recover my vessel, or even quit the game. When I load the persistant save it takes me back to the moment the lander undocked from the command module. The only way to be able to save the game again or recover the kerbals is by destroying the command module on reentry.

This happens with and witout mods, over different save files, and even afer reinstalling on a seperate drive