Cygwin can't find the command sim_vehicle.py -j4 --map on windows10

I followed the steps on the web http://ardupilot.org/dev/docs/sitl-native-on-windows.html#sitl-native-on-windows,but I met a problem when i input the command sim_vehicle.py -j4 --map, it tell me the command can’t find. Can anyone help me? Please advise.

I find a problem same to me on the web https://github.com/ArduPilot/ardupilot_wiki/issues/156, but it seem doesn’t work for me.

I’m pretty sure you’ll have to preface the command with ‘./’; i.e. ‘./sim_vehicle.py’ if it’s in your current directory. If not you’ll need the full path.

You inspire me. The real problem is that my ardupilot version is 3.3.3, so I should input sim_vehicle.sh-j4 --map rather than sim_vehicle.py -j4 --map.