If you open two copies of delphi 7 at the same time you will also get the 216 error. I believe its a file on your machine that must be locked or something similar. I often have three or four copies of Delphi 7 running at the same time (Web Services server, Presentation Layer server, a Testing App and one of my games). To do this I need to wait a few minutes after opening one delphi before I open the next.

Hope this helps.