CoreMedia Operations Basics, Version 7.5.45-10
4.3.2. Starting CoreMedia Command-Line Tools | 4.3.2.2. Which JVM will be used?

For command-line tools the information about the JVM to use is read from the property JAVA_HOME in the pre-config.jpif file or from the environment variable.

If JAVA_HOME is not set, a JVM installed in the COREM_HOME directory will be used as the active JVM. The installation directory of the JVM has to be located directly below these directories. For example, <COREM_HOME>/jre.