# Overview

Before using Substation ES, you must supply the information in the configuration file to Substation ES ESB Interface. Substation ES ESB Interface requires this configuration file information to initialize successfully. Information includes data about connecting to messaging daemons and servers used for message communication.

The structure of the configuration file has changed in this release and can change in future releases as new features and improvements are made. A configuration conversion utility is supplied to reformat your definitions when you upgrade from one release to another. See the TIBCO Substation ES Release Notes for the release of interest. You can then determine whether conversions are necessary and what to do to upgrade.

A Configuration File must be allocated with IDCAMS. See Allocation of Configuration File for details.

Substation ES contains configuration utilities to assist you to use, maintain, and promote definitions in configuration files.

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