How to fix the error ORA-00307: requested INSTANCE_NUMBER out of range, maximum is string?

In this post, you’ll learn more about the Oracle ErrorORA-00307: requested INSTANCE_NUMBER out of range, maximum is string with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-00307: requested INSTANCE_NUMBER out of range, maximum is string

Reason for the Error ORA-00307: requested INSTANCE_NUMBER out of range, maximum is string

The initialization parameter INSTANCE_NUMBER specified a number that was out of range.

How to fix the Error ORA-00307: requested INSTANCE_NUMBER out of range, maximum is string ?

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

Change INSTANCE_NUMBER to a valid range and restart the instance. The minimum value is one and the maximum value is the lower of the operating system-specific maximum or the MAXINSTANCES option specified in the CREATE DATABASE statement. See also your operating system-specific Oracle documentation.