Flash Died at 51% now car won't start
 

I have flashed several times with no issues. Today I had a TBE installed and tried to reflash using the proper basemap. It failed at 51% and wouldn't progress. Now when I try to read from or write to the ECU it fails. Help!

Sounds bricked..you will need to recover.next time follow the brick save method.
You basically go through the brick steps when you get the error the first time WITHOUT turning off comp or disconnecting the tactrix.

When you say recover do you mean bench flash it as per the instructions here -> http://www.evoxforums.com/forums/showthread.php?t=29820

Yes..if this happens again in the future you can go through the recovery steps in ecu flash, right after your failed communication as l9ng as you have disconnected Ted the tactrix or comp yet.