We are planning to upgrade but before that we are trying to explore the 12.9 version. However we encounter issues during launching of Toad 12.9.
Our current toad version is 8.6 and we don't have this kind of issue. Also I have tried other methods based on this forum like adding the environment variables of oracle_home and tns_admin to point 11g or 10g location but still having this issue.
We are currently running in multiple oracle client.
10g for toad 8.6
11g for Peoplesoft App designer
Any advice is greatly appreciated.