hobbitd error?

list Mike
Sat, 17 Feb 2007 14:54:58 +0000 (UTC)
Message-Id: <er7502$44p$user-0505ea726355@xymon.invalid>

In my hobbitd.log file every few minutes I get the message:

Cannot open checkpoint file /opt/hobbitd/4.2.0/server/tmp/hobbitd.chk.1171722034 : No space left on device

The web page 'bb2.html' is not updating at all. Any gueses what's going on? My filesystems
have plenty of space.

Fedora Core 5
Hobbit 4.2.0

Mike