Well, we're not going to be able to use that link to see what the error is.
You'll need to shell into the system, cd to web2py/applications/whatdidisell, and do "less errors/45.*6e5b"
Or scp that file to somewhere you can drop into a browser or an xml viewer.
If you're using less, things will look very messy, but do G to the bottom of the file, and examine the traceback information.
/dps