cron dies - Cannot create temporary file

lanse_at_adelphia.net
Date: 10/25/05 

Date: 25 Oct 2005 05:53:59 -0700

We have a SCO 5.05 UNIX systemm which has been running since 1999.
Starting about 3 months ago we noticed our cron dying overnight. When
we checked the cron log, the error which triggered this was "Cannot
create temporary file". This error message has occurred with different
programs, whether it be a uucp daeman or an inventory print out from
root.

What is causing this and what is the solution?