Failure to make sitl on Winodws

I’m trying to build the ArduCopter by following the instructions here:
dev.ardupilot.com/wiki/sitl-native-on-windows/
On the make sitl -j4 step, errors occur…


Merged enum MAV_CMD
Found 176 MAVLink message types in 2 XML files
Generating C implementation in directory /tmp/ArduCopter.build/libraries/GCS_MAV Link/include/mavlink/v1.0/ardupilotmega
Generating C implementation in directory /tmp/ArduCopter.build/libraries/GCS_MAV Link/include/mavlink/v1.0/common
Copying fixed headers
C:/cygwin/home/derek/ardupilot/mk/mavgen.mk:9: recipe for target ‘/tmp/ArduCopte r.build/libraries/GCS_MAVLink/include/mavlink/v1.0/ardupilotmega/mavlink.h’ fail ed
make: *** [/tmp/ArduCopter.build/libraries/GCS_MAVLink/include/mavlink/v1.0/ardu pilotmega/mavlink.h] Aborted (core dumped)
make: *** Deleting file ‘/tmp/ArduCopter.build/libraries/GCS_MAVLink/include/mav link/v1.0/ardupilotmega/mavlink.h’

I’m stuck… any suggestion for how to get this to build or look for errors?
I’ve rebuild the tool chain twice in different locations and get the same error ;(
Thanks in advance for any help you can provide.

I am also having this issue as well.

That makes at least 5 of us… What you describe looks to be the same symptoms that myself and two others are experiencing:

Major problem when installing “SITL” on Windows

NB: this was raised as issue 3586 on the project’s github page. There is a workaround posted there that you can use to get SITL working again.