The tool requires the MQeDiagnostics.properties file to be supplied as input. Edit MQeDiagnostics.bat so that it points to the correct location for this file and rerun the tool.
JavaEnv.bat is not configured correctly. Edit MQeDiagnostics.bat and JavaEnv.bat if necessary and rerun the tool.
Edit JavaEnv.bat and MQeDiagnostics.bat if necessary so that the <mqe_install_dir>\MQe\Java\Jars\MQeDiagnostics.jar can be found in the CLASSPATH environment variable.