How to fix the Oracle error ORA-06400: NETCMN: No default host string specified?

In this post, you’ll learn more about the Oracle ErrorORA-06400: NETCMN: No default host string specified with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-06400: NETCMN: No default host string specified

Reason for the Error ORA-06400: NETCMN: No default host string specified

There was no default host string specified in the configuration and the user didn’t specify any explicit connect string.

How to fix the Error ORA-06400: NETCMN: No default host string specified ?

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

Either reconfigure the system specifying a default connect string or use an explicit connect string.