I'm very excited to try out ikiwiki, since it should fit my purposes extremely well, but I'm having trouble with the search plugin. I'm pretty sure that right after I installed ikiwiki and needed dependencies, the search plugin was working fine. However, now when I try to use search, I get "Exception: Unknown function `this'" error on a blank page. I'm not sure how I should go about debugging this issue - my server's (I use Lighttpd 1.4.22) error log has no mention of the exception and there's nothing in /var/log/syslog either.

What might be causing this exception and how I might go about debugging exceptions?

> Appears to be coming from your xapian omega cgi binary. If you
> run `strings /usr/lib/cgi-bin/omega/omega` you can see it has
> "Exception: " in it, and I have found some similar (but not identical)
> error messages from xapian in a web search.
> 
> I don´t know what to suggest, other than upgrade/downgrade/reinstall
> xapian-omega, and contacting the xapian developers for debugging.
> You could try rebuilding your wiki in case it is somehow
> caused by a problem with the xapian database. Failing everything, you
> could switch to [[google_search_plugin|plugins/google]]. --[[Joey]]