How to fix the Oracle error PRCN-02057: Invalid listener protocol value {0}?

In this post, you’ll learn more about the Oracle ErrorPRCN-02057: Invalid listener protocol value {0} with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

PRCN-02057: Invalid listener protocol value {0}

Reason for the Error PRCN-02057: Invalid listener protocol value {0}

Cause: The specified listener protocol value is invalid.

How to fix the Error PRCN-02057: Invalid listener protocol value {0} ?

You can fix this error in Oracle by following the below steps

Action: Provide a valid listener protocol value. It cannot contain special characters ‘:,/’