Connection error: The type initializer for 'OracleInternal.Network.AddressResolution

Could it be that you copied over a SQLNET.ORA?

If it is there, try removing LDAP from NAMES.DIRECTORY_PATH in SQLNET.ORA

Let's make sure the SQLNET.ORA and TNSNAMES.ORA you think you are using are what are actually being used:

In the list of extensions, find Oracle Developer Tools, then right click the "gear" icon and select Configure Extension Settings.

In the settings for ODT  you will see: Network Configuration: Config Files Location

Using Windows Explorer or command line, go to the path location set there and see if there is a SQLNET.ORA and/or LDAP.ORA. If there is, temporarily rename the SQLNET.ORA and LDAP.ORA file name and restart Visual Studio Code.

I just noticed that you seem to have said that you are also attempting to create a "Basic" connection (with just host, port, and service name). Is that true? Do you get the same error with a Basic connection?

Hm, this doesn't sound good.

Can you please let me know what is the path set in Network Configuration: Config Files Location?

Also, can you successfully ping the "Database Host Name" used in the basic connection? (I assume so because you can connect with 19.3.1)

Can you confirm you are using Windows? Is it Windows 7?

Thanks. I'm not sure if it matters, but you are using forward slashes in the path while Windows uses backslashes.

Can you try the following?

1) Change the config file location setting to the correct Wndows format (use backslashes), close VS Code and reopen it and try again.

2) Try creating a new directory, such as c:\odtvscode and copy only the  tnsnames.ora file there. Change the config file location to point there (using  backslashes).  Close VS Code and reopen it and try again.

I see what else I can find out we can try.

Is there anything else that is different in your configuration between the 19.3.1 install and the 19.3.2?

Are you running this in a Virtualbox VM and are reverting to a snapshot that still has 19.3.1 installed? Is that how you are "downgrading"?

One additional request:

Can you zip up the *.log files generated in the %USERPROFILE%\.vscode\extensions\oracle.oracledevtools-19.3.2 directory and attach them to this thread, or email them to christian (dot) shay (at) oracle (dot) com?