Resolution:
If you need to modify the following configuration items to non-default values e.g.

In $BWC_HOME/server/&ltserver_name>/config/icconfig.xml:

IC_SERVER_DEBUG
IC_STATUS_LOG
IC_TIBRV_DAEMON
IC_TIBRV_NETWORK
IC_TIBRV_SERVICE
IC_AUDIT_LOG

In $BWC_HOME/server/&ltserver_name>/config/icrepconfig.xml:

DEBUG
USER_ID
LOG_FILE
LOG_LEVEL
IC_TIBRV_DAEMON
IC_TIBRV_NETWORK
IC_TIBRV_SERVICE

You can set them in icconfig.xml and icrepconfig.xml prior to registration of the
components using DU. DU(whether command line or GUI) will read the values from the icconfig and icrepconfig XML files and set them appropriately.

To modify the values in XML files, use Administrator GUI.

OR use IcStart on Unix or Server Manager on Windows.