> We have several lists that are connected to either Oracle or SQL
> Server database tables.
> 
> We have been getting more and more of these errors stating that the
> list in use by another process.
> 
> Can someone explain exactly what is going on?
> 
> The timing of this particular example 00:03:02 leads me to believe
> that Listserv keeps trying to access the list, since I doubt that
> there is user trying to mail to this list at midnight.

Midnight is when digests are sent. It appears to me the problem is 
what it states, another process has a lock on the file. This is 
generally a backup process or perhaps a virus scanner. Since this is 
just after midnight, I'll bet on the backup process.