We have a user who currently has an XP machine with Access 2003 and Oracle 8.1.
We are currently in the process of moving them to Windows 7, Access 2003 and Oracle 10.2g but have hit a snag with the Access > Oracle ODBC connection.
On the old XP pc this is still working perfectly fine. On the Windows7 PC they receive the error;
"ORA-12514 TNS Listener does not currently know of service requested in connect descriptor when attempting to run the same query."
If I go to Control Panel > Administrative Tools > Data Sources and check the ODBC connection, it connect fine.
I have check the tnsnames.ora file countless times and it looks correct. I have even tried to directly copy the tnsnames.ora file directly from the old computer to the new computer and the connection from Access still fails.
The user has SQL developer and did a basic connection and query check and this worked fine, so it seems to only be something that is affecting Access.
Might something have changed between Oracle 8.1 and 10.2 that is causing this?