Thanks Neil.
Does this mean that each instance of the fll has its own data segment? The reason I ask is becuase we've experienced some difficulties with some fll's here that were loaded twice during an application's lifetime - once when the app started and one more time by a dll that was called by the same application. When we released the dll within the app (hence releasing the fll's instance), no error occured. When we released the app a windows error would pop up - 'VFP has caused an invalid page fault in kernel32' etc.

Any thoughts as to if the data segment has anything to do with this?

Valter