Service failure errors not refleccting in error logs on IS Admin Page - webm 9.5

Hi All,
I came across this problem in webmethods 9.5 Exit Step.
When I have nested level services , and there is try-catch mechanism in each of them, I am expecting that i get the Error Signal message for all the services in the hierarchy when a process model / any service fails. But on IS Page (9.5 env) logging-> Errors,am not getting it. The code is just as it is in our existing 7.1 env and we get detailed Error Signal Message for each Exit (Flow) that comes across.
Am I missing any new setting ? Can any body please suggest what could be checked?
Regards,
Priya Bhauka

Please enable this extended setting and try again:

watt.server.deprecatedExceptionLogging=true

You may need to restart the IS.

HTH,
RMG