Disconnecting From Interface To Be Used By Progman
If the vehicle to be programmed was previously being diagnosed using a diagnostic head with the GT1, then the connection with the head must be broken before that head will be recognized by Progman.
Select "Service"
Select "Setting up a connection"
Select "Quit connecting"
The selected head is free/disconnected
Select "End"
Select "Change"
Select "Coding/Program"
Select available SSS
Select "Continue"