I have installed a few versions of Oracle on my machine. I have tried 64 bit and 32 bit versions. I have installed 11G. I need Oracle 10G 32 bit.
Using the following guide I removed all versions of Oracle from my PC:
Uninstall all Oracle components using the Oracle Universal Installer (OUI). Delete the HKEY_LOCAL_MACHINE/SOFTWARE/ORACLE key which contains registry entries for all Oracle products by using regedit. Delete any references to Oracle services/components in the following registry location: HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/Services/. Looks for key entries that starts with “Ora” which are obviously related to Oracle. Reboot the workstation. Delete the ORACLE_BASE directory. (i.e C:\Oracle) Delete the C:\Program Files\Oracle directory. Empty the temp directory. Empty the recycle bin.
I then installed Oracle 10G 32bit.
When I go to connect in PL/SQL Developer I get:
ORA-12154: TNS:could not resolve the connect identifier specified. (http://i.stack.imgur.com/UGpwD.png)
I have set up my Oracle Home and added a value for *tns_admin*. My TNSNAMES.ORA file is in the directory referenced by *tns_admin*.
I think my Oracle is picking up the TNSNAMES.ORA file as the drop-down list for Database in populated in PL/SQL Developer.
The only options I see at the moment are:
- Uninstall and try again
- Re-install Windows to make sure the settings are gone.
Any help you could give would be appreciated.