resource limit error...

[Dan Singletary]

What does this error mean?
> bogofilter: error: the data base file size is only 16 pages
> bogofilter:        below the resource limit. Cowardly refusing
> bogofilter:        to continue to avoid data base corruption.
> procmail: Program failure (3) of "bogofilter"
> procmail: Rescue of unfiltered data succeeded

I understand that bogofilter is exiting with error code 3, and procmail 
is requeuing the message for retry later... but what does this "resource 
limit" mean?  Is this error given when there's a memory shortage on the 
machine?

-Dan