I received that exact same error after upgrading to VB SP4. The development machine references ADO 2.5 after upgrading, so you will need to run mdac_typ.exe on your target PC to upgrade it to ADO 2.5

Or change your application reference to ADO 2.1 and recompile the exe.

Option 2 worked for me. I did not want to upgrade the client machine until I knew more about the changes in ADO 2.5.

[Edited by jbart on 08-31-2000 at 07:39 AM]