Errors while running adaptive cruise control model from website

I an trying to run Adaptive Cruise control model from https://www.mathworks.com/help/mpc/ug/adaptive-cruise-control-using-model-predictive-controller.html

I have used the code provided by them but i'm getting the following error.

Error evaluating 'InitFcn' callback of MPC block (mask) 'mpcACCsystem/Adaptive Cruise Control System/MPC'. Callback string is 'impcblock_InitFcn'

Caused by:

• Can not resolve: mpcobj.

Answer 1

[Fangjun Jiang]

It requires the MPC toolbox. Do you have it? run

ver mpc
license inuse

[Dhanush Sureshbabu]

yes, i do have the tool box

MATLAB Version: 9.6.0.1072779 (R2019a)

MATLAB License Number: 192331

Operating System: Microsoft Windows 10 Pro Version 10.0 (Build 18362)

Java Version: Java 1.8.0_181-b13 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode

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Model Predictive Control Toolbox Version 6.3 (R2019a)

control_toolbox

matlab

simulink

[Fangjun Jiang]

The weblink is for R2020a. But I followed it in R2019a. No errors.

[Dhanush Sureshbabu]

oh ok, even i'm using R2019a. Dont know where i'm making mistake

[Fangjun Jiang]

Run "license inuse" after that error to see if you do have the MPC license active.

Re-start MATLAB, try again starting from the addpath() command in the weblink.

[Dhanush Sureshbabu]

The mpc license is not active after the error

[Fangjun Jiang]

so what is the exact output of "license inuse" after that error?

[Dhanush Sureshbabu]

license inuse

control_toolbox

matlab

simulink

[Fangjun Jiang]

I think that is the cause of the problem/error. You have the MPC toolbox installed but you couldn't check out a license for MPC. Your license is probably served on a license server. For whatever reason, you couldn't check it out. The code in the callback is trying to create a MPC object. If no error, the "license insue" should return those plus "mpc_toolbox".

Figure out the license issue, license('checkout','mpc_toolbox') and license('test','mpc_toolbox') might be useful.

[Dhanush Sureshbabu]

thank you for your help