How to fix the Oracle error CLSGN-00072: Connection to server failed.?

In this post, you’ll learn more about the Oracle ErrorCLSGN-00072: Connection to server failed. with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

CLSGN-00072: Connection to server failed.

Reason for the Error CLSGN-00072: Connection to server failed.

GNS was unable to initialize the transport that it was used to communicate between the client and server.

How to fix the Error CLSGN-00072: Connection to server failed. ?

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

The message following indicates the exact error that occurred.