Using the Eclipse configuration I posted earlier the plug-in with the setlogrlev OSGi console command wouldn’t launch. To solve this you can either manually to start the com.ibm.rcp.core.logger plug-in from the OSGi console or configure the config.ini file on the launch configuration. The former can be done with the below command. A description on how to do the latter has been added to the step-by-step instructions.
start com.ibm.rcp.core.logger