did you include the
vb constants file?
if not, that might be the problem.
you can also try
rs.open rstHDI.open "HepDoseDate", Cnn, 1, 2
that should work.
oh, just a tip, when you just say "HepDoseDate", you return the ENTIRE table. do a select statement that returns no records at all. like
select * from HepDoseDate were PKID = 0
since most identities start at 1, that should return 0 records.