hobbitd error?

list Anton Burkhalter
Sat, 17 Feb 2007 16:44:34 +0100
Message-Id: <user-8b98cc8316a4@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

No space left on device means "No space left on device"   ==>  Your disk
is full; what else.