>Dave,
>
>Sorry if I am being a bit slow here, but I cannot see why I do not get the error with multiple users on different PC's who are also USEing the tables in SHAREd mode. Surely, the error should still manifest itself as a conflict on access to the shared table across the network.
>
>Barry.

MAYBE our wires are crossed..
are you able to add a new index to a table even while it is in SHARED mode?
is the command you use

INDEX ON ... TAG ?