When you install the Informatica services using the Informatica installer, the installer creates a domains.infa file in the Informatica installation directory. The domains.infa file contains the connectivity information for the gateway nodes in a domain, including the domain names, domain host names, and domain host port numbers. The command line programs require the connectivity information present in the domains.infa file to connect to the gateway nodes in a domain. You can set the environment variable INFA_DOMAINS_FILE to the path and name of the domains.infa file. Ensure that you configure the INFA_DOMAINS_FILE variable on the machine where the Informatica services are installed.