Errors when trying to define Design Requirements in Control System Designer

I am trying to set Design Requirements in a Bode plot for a discrete time system in Control System Designer, but I am getting error messages in the main MATLAB window. I've verified that I can reliably reproduce the error messages very simply:

fs = 100;
dt = 1/fs;
sys = tf(1,1,dt);
controlSystemDesigner(sys)

Then add a new Bode plot (doesn't seem to matter which one). Right click in that new Bode plot and select Design Requirements > New…

It then outputs these error messages in the main MATLAB window:

Unable to resolve the name 'Constr.Ts'.

Error in controllib.chart.BodePlot/getNewConstraint (line 1480)

newConstraint.Requirement.setData('xData',(pi/Constr.Ts) * [0.01 0.1]);

^^^^^^^^^

Error in editconstr.NewRequirementDialog/settype (line 177)

newConstraint = getNewConstraint(this.Client,Type,this.Constraint);

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Error in editconstr.NewRequirementDialog/setClient (line 109)

this.settype(this.List(1).Type);

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Error in editconstr.NewRequirementDialog.getInstance (line 39)

inst.setClient(Client,ParentFig);

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Error in ctrlguis.csdesignerapp.plot.internal.ResponsePlot/designConstr (line 395)

editconstr.NewRequirementDialog.getInstance(View,View.Parent);

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Error in ctrlguis.csdesignerapp.plot.internal.ResponsePlot/createChart>LocalDesignConstr (line 133)

designConstr(Viewer,View,ActionType)

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Error in ctrlguis.csdesignerapp.plot.internal.ResponsePlot/createChart>@(es,ed)LocalDesignConstr(this,hChart,'new') (line 58)

MenuSelectedFcn=@(es,ed) LocalDesignConstr(this,hChart,'new'));

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Error using matlab.ui.internal.controller.WebMenuController/fireMenuSelectedEvent (line 78)

Error while evaluating Menu Callback.

Any idea what is going on and how I can fix it?

UPDATE: Walter's comment reminded me that I forgot to mention, I'm running MATLAB in Windows 11 Pro on a HP ZBook Fury 16 G10 Mobile Workstation.

[Walter Roberson]

Datapoint:

I had to play around for a bit but I was eventually able to replicate this problem on MacOS 15.6 with R2024b.

[Jason]

Interesting that you had to play around a bit to replicate the problem. What did you have to change? Maybe I can use that to back out why I'm having a problem.

Answer 1

[Andrew Ouellette]

Hi @Jason,

This is a bug in the product. You should be able to change the line mentioned in this error from this:

Error in controllib.chart.BodePlot/getNewConstraint (line 1480)

newConstraint.Requirement.setData('xData',(pi/Constr.Ts) * [0.01 0.1]);

to this:

newConstraint.Requirement.setData('xData',(pi/newConstraint.Ts) * [0.01 0.1]);

and the requirement dialog will open correctly.

This issue will be fixed in a future release of MATLAB.

[Jason]

Thank you! That worked perfectly after I figured out where to find and edit that file.