Hi
The error which you have mentioned "Gives Null pointer exception while trying to read getLastCommunication date and time." is pretty common error and generally dosent persist once we close SCC and re-login. We saw this error in some of our applications but it was not a show stopper or create major issues for the users. I guess we can ignore these errors.
Are you getting this reguraly and is there any pattern which it occurs? Is it causing any issues to users?
Thanks,
Shiv