As for the Error 43 message, this occurs when "fast computers" try to access certain lists. There was an update on the site for this. You are perhaps using an older version of the program (?). The "work around" with older versions was to disable the Name AutoFind box in the Desktop Preferences window (under Utilities). I'm not sure about the source limitations; but I believe that there are more limitations in the normal mode than in the advanced mode. Perhaps someone else can join in here and help with that aspect.You might try rebooting, then if there are still problems, try fixme.bat and the Project check/repair options.