May not an HPT problem, but throwing this out here to see if others have had this problem.
Last night at the track I went to write a different tune and it made it through erase and about 40% into the write sequence when the car "rebooted" -- the lights flashed off and back on and the tune stopped writing. Tried again and similar problem, but only made it about 15%.
I had a similar problem once before and it acted like the battery was weak so I threw it on a battery tender and it solved the problem previously. Last night even hooked up to someone else's car like I'm getting a jump it wouldn't finish writing. It timed out/"rebooted" at various times through the write process, sometimes even during the erase it gave up.
Am I correct in assuming it's just a battery (I have a new battery I'll be driving up and replacing tonight), or is it something else?