i'm trying to run your system in parallel mode with different stateflow method.since i can't make change in electric subsystem, i put zero for generator required torque. by doing so i disabled Gen.however, when i want to run the simulation, vehicle is always in electric alone mode and doesn't switch to other modes.in other word, motor is the only working power source and engine speed becomes negative. but when i return Gen to the system, everything works nice. another issue is that do i need to change sun ring arrangement of the planetary gear to be operated in parallel HEV. please help me in these issues.