After the Tomcat application server datacollector is upgraded from the initial FP4 level to FP5 and then FP6, you may be unable to successfully startup the application server because it was previously configured with ITCAM.
Unrecognized option: -agentlib:am_sun_15
Could not create the Java virtual machine.
Resolving the problem
Once the FP6 has been properly applied, just unconfigure the application server and then configure it again as per standard procedures.