>Why is it that Visual Foxpro claims to have no limitation to the size of fpt files for memo fields,

Uh, we've never made that claim. The limit is 2Gb.

> but yet when one of them we use goes over 1 GB, it only runs stable for a >few minutes after that, then the fpt looses a lot of info. Random blocks >of data disappear from random accounts.

More details, please. OS? Networked or local? Multi-user?