Compile Error -- 'win' is not recognized as an internal or external command

We are working on using Simulink with the VEX Arm Cortex microcontroller for the BEST robotics competition. The simulation works fine, but when we try to deploy it to the hardware, we are getting this error message:

vexarmcortex_tankrobot.o vexarmcortex_tankrobot.c
'win' is not recognized as an internal or external command,
operable program or batch file.
gmake: *** [vexarmcortex_tankrobot.o] Error 1
C:\Users\huang\OneDrive\Documents\MATLAB\Examples\armcortexvexmicrocontroller\GettingStartedARMCortexBasedVexExample\vexarmcortex_tankrobot_ert_rtw>echo The make command returned an error of 2
The make command returned an error of 2
C:\Users\huang\OneDrive\Documents\MATLAB\Examples\armcortexvexmicrocontroller\GettingStartedARMCortexBasedVexExample\vexarmcortex_tankrobot_ert_rtw>An_error_occurred_during_the_call_to_make
'An_error_occurred_during_the_call_to_make' is not recognized as an internal or external command,
operable program or batch file.
### Build procedure for model: 'vexarmcortex_tankrobot' aborted due to an error.
Error(s) encountered while building "vexarmcortex_tankrobot":
### Failed to generate all binary outputs.
Component:Simulink | Category:Block diagram error

Help, please? We would really like to learn how to utilize Simulink for our program.