Low on memory. Aborting!

I am creating my first catalog with the 8.1.9 standard version of CatDV. When I import directory from a 1.5TB drive I eventuallly always get the following error.

An error occurred wile importing abcd.flv

Low on memory. Aborting!
Processed 4159 of 28934 files

I'm running this on a new windows 7 machine with 12GB of ram. Do I have to import my directories in smaller chunks or does this mean something else is wrong? I assume that CatDV doesn't work with flv's so that part doesn't really bother me.

Thanks

Dan