In this post, you’ll learn more about the Oracle ErrorORA-02188: Cannot enable instance publicly with the details on why you receive this error and the possible solution to fix it.
Oracle Error Description
ORA-02188: Cannot enable instance publicly
Reason for the Error ORA-02188: Cannot enable instance publicly
An attempt was made to publicly enable a thread associated with an instance.
How to fix the Error ORA-02188: Cannot enable instance publicly ?
You can fix this error in Oracle by following the below steps
Leave out the PUBLIC keyword.