Debug mxserver process on HP-UX 11.11

[Jonas Linde]

Hello,
I'am trying to find out why the mxserver process suddenly starts dying on HP-UX 11.11. When surfing in to http://server:280 the mxserver process is spawned and browser is redirected to https://server:40000/login.jsp. Then the mxserver process suddenly dies without ever listening on port 40000. Running mxserver -s returns "Starting Tomcat Web Server..." and then nothing else.
How is this problem best debugged? I have found /etc/opt/mx/config/debugsettings/mxserver.props but do not know whether this is the correct file to use nor which parameter to change.
Yes, the installation has been working perfectly and as far as I know nothing has been changed ;-)

All suggestions is very much appreciated!
Jonas