[Mobhack]

There can only be the one instance of the Borland Database Engine (BDE) running at the same time. The $210 error is generally insufficient environment memory, but my PC has 6 gigs, so should be enough.

However the BDE is probably using the same runtime environment, so only one can run - the second one finds its resources grabbed by the first and falls over. This seems to be a known problem with the BDE from a quick Google search.