Error message 'Error occurred while executing External Mode MEX-file 'ext_comm':'

Question

JOOWON PARK 2020-5-6

2
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/523303-error-message-error-occurred-while-executing-external-mode-mex-file-ext_comm

回答： Ankur Bose 2020-10-28

I'm using the example 'Attitude Control for X-Configuration Quadcopter Using External Input' supported from the embedded coder support package for px4.

I executed the model with 'monitor and tune' button, however, I got an error message below.

Error occurred while executing External Mode MEX-file 'ext_comm':
Failed to connect to the target. Possible reasons for the failure:
a) The target is not switched on.
b) The target is not connected to your host machine.
c) The application for the model is not running on the target. You might have clicked the Stop button. If the Run button is not dimmed, click it. Otherwise, click the Build button, which downloads and runs your application on the target.
Caused by:
An error occurred attempting to open an rtIOStream. More detail may be reported in the MATLAB command window
Component:Simulink | Category:Block diagram error
Unable to connect to the 'PX4 Host Target' target for 'px4demo_AttitudeControllerWithJoystick_quadrotor'.
Component:Simulink | Category:Model error