How to fix the Oracle error INS-40903: Host name contains invalid characters.?

In this post, you’ll learn more about the Oracle ErrorINS-40903: Host name contains invalid characters. with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

INS-40903: Host name contains invalid characters.

Reason for the Error INS-40903: Host name contains invalid characters.

Cause: The name you provided as the host name contains one or more invalid characters.

How to fix the Error INS-40903: Host name contains invalid characters. ?

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

Action: Ensure that the host name contains valid characters. Valid characters for host names can be any combination of lower and uppercase alphanumeric characters (a – z, A – Z, 0 – 9), and hyphen (-).