How to resume upgrade assistant (PRPC_Setup.jar) from previous point

I am running upgrade assistant (PRPC_Setup.jar) file from local machine using command prompt after passing DB connection details at step 8 and START.

It went well for 7 hours and then failed at _importPreUpgrade step. I ran again prpc_setup.jar but it started from begining.

ANSWER

Which version are you upgrading to?. If you are using Pega 7.2.1 then setup.jar file will automatically resumes the upgrade from where it is failed.