TSM Upgrade to 7.1

Anyone has test about TSM 7.1?
I try to upgrade TSM from 6.3.4 to 7.1 in silent mode and got error from IBM installation manager
>install.bat -s -acceptLicense -vmargs "-DBYPASS_TSM_REQ_CHECKS=true"
ERROR: Create a password for secure communications.

I try another way to user console mode
install.bat -c -vmargs "-DBYPASS_TSM_REQ_CHECKS=true"
but I got:
1. ERROR: The system does not meet the minimum memory requirement of 12 GB.

Anyone know how to install TSM 7.1 and skip prerequisite check please help me.