Someone had this problem when trying to communicate with a year 2000 vehicle interface SD connect C4 Plus, error " HHT-WIN Not Found".
Solution:
Sorry about that, The software of win10 system does not support hhtwin. You need to use the Benz software of win7 32bit system to test hhtwin.
SD connect C4 Plus tech support www.obdexpress.co.uk .
