Hi, This morming my backup file do not works fine. I can not click on building anymore. Yesterday, i do a mission to test a propulsor on orbit (MK-1), but my kerbal die during landing (a stupid EVA). Debug information show a Null pointer exception ! Like my kerbals QI, not sure about the relation... KSP Version : 0.90.0 Beta Screenshot : http://imgur.com/ObunlIS Save file : http://dl.free.fr/dPf6JM33K Log file : http://dl.free.fr/diQikMWiW DxDiag file : http://dl.free.fr/fnUUufK8W Note : dl.free.fr drop files after 30 days. Best regards, William