Error in PX4 SITL with UAV Toolbox Support Package for PX4 Autopilots

I'm performing SITL on Windows 11 with jmavsim using UAV Toolbox Support Package for PX4 Autopilots but I got an error:

On the diagnostic view I got:

Top model targets built: Model Action Rebuild Reason ==================================================================================

openloop_2022b Code generated. Global variable px4_Bus_actuator_armed changed. 1 of 1 models built (0 models already up to date) Build duration: 0h 2m 11.97s

action: EXT_INIT Creating Target Handler (XCP on TCP/IP)... Build directory: D:\model validation\matlab2022b\openloop_2022b_ert_rtw Target name: 127.0.0.1 Target port: 17725 action: EXT_CONNECT Connecting to the target...

External Mode Open Protocol Connect command failed

Caused by:

• Could not connect to target application: XCP TCP/IP error: Connect failed

Component:Simulink | Category:Block diagram error

Unable to connect to the 'PX4 Host Target' target for 'openloop_2022b'.

On the cmd, I got:

Answer 1

[Thiago Felippe]

I had the same problem. I found the following workaround:

• Click in "Monitor & Tune"
• Wait for the Simulink error. Wait a little more.
• Don't close the command window nor the jMAVSim
• Go in the down arrow in "Monitor & Tune" and change it to "Connect" (under "Step by Step Commands"). See image below:

• Wait until the connection is made
• Click in "Start" (it shows in place of "Monitor & Tune"). See image below:

• And it is done!

I think the Simulink doesn't wait to PX4 Host Target to fully boot up before trying to communicate with it.