Getting error "'2299950257' is not a valid integer value" when connecting to Oracle 19C with Toad for Oracle 13.1
The Oracle client being used was version12.
Issue fixed after upgrading the Oracle client to version 19* and upgrading Toad for Oracle to version 14.
The latest version of Toad for Oracle can be download here.
*Note that is recommended that your client version be of the same release (or later) as your database server.
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