While preparing for the previous bug report, I didn't read the documentation and while setting the trace log to a file, I put in: "c:\foo.log". This prevents HouseBot from starting due to it appending this string with a path in front of it producing a bad filename. Perhaps HouseBot could just fail to trace to a file if it's a bad filename instead of failing to startup.
I fixed the problem by using Access and finding that c:\foo.log in HBData.mdb and changing it to "foo" instead.