>This is my second post concerning memory issues. Unsuccessfully used examples from other threads as well. My program now exits when it encounters UNLOCK. Is this a bug in VFP 8/9? It works well with other 'smaller' tables, but seems to fail with the larger.

I think there's something in the behavior of Unlock in VFP9 (and maybe 8), where it is recommended to always use "unlock in {alias}", because unlock without an alias had some effects which I can't remember now... and can't think of a good set of words to search on.