Control System Toolbox is installed but not working.

Hi,

I'm having an issue using the Control Systems Toolbox with Matlab version 9.14.0.2674353 (R2023a) Update 7 (student license). the problem with the toolbox is that it shows as installed in both the addon manager and in the return for the following command line input:

>> addons = matlab.addons.installedAddons

addons =

2×4 table

Name Version Enabled Identifier

________________________ _______ _______ __________

"Control System Toolbox" "10.13" true "CT"

"Symbolic Math Toolbox" "9.3" true "SM"

...but does not appear in the return of the "ver" command and most importantly, does not work for the functions I need for a lab as shown below:

>> t=0:.01:4;

>> b = [1];

>> a = [1 6 8];

>> h = impulse(b,a,t);

Unrecognized function or variable 'impulse'.

>> ver

-----------------------------------------------------------------------------------------------------

MATLAB Version: 9.14.0.2674353 (R2023a) Update 7

MATLAB License Number: XXXXXXXX

Operating System: macOS Version: 14.6.1 Build: 23G93

Java Version: Java 1.8.0_202-b08 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode

-----------------------------------------------------------------------------------------------------

MATLAB Version 9.14 (R2023a)

Symbolic Math Toolbox Version 9.3 (R2023a)

I've already tried updating Matlab (which overwrote the addon files but did not help) and restarting both Matlab and my computer. Any help or suggestions will be much appreciated.

Cheers,

Fergus

Answer 1

[Shivam]

Hi Fergus,

Here are few things you can try to resolve the issue.

1. It may be possible that MATLAB path doesn't have the 'control system' toolbox directories. You can use these commands to restore the default path

restoredefaultpath;
rehash toolboxcache;
savepath;

2. Also, make sure that the toolbox directory is on the MATLAB path using the command:

pathtool

I hope it resolves the issue.

[Fergus]

That fixed it, thanks heaps for the advice.