We are having some strange issues with Novell Messenger. It will
randomly begin showing that nobody is online, and the error message that
is displayed on the console is "DDC: Error writing to the directory".
If we restart the server agent everybody is back online. Has anyone
experienced this problem?

I just applied Service Pack 5 last week hoping that it would solve the
problem with having to restart messenger every day, but it didn't seem
to have done anything.