What means "MATLAB connector is not running"?

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Bruno Luong
Bruno Luong 2022-5-20
评论： Bruno Luong 2022-5-24
I have a GUI app that runs fine under MATLAB, however when compiled as standalone with MCC, I get a strange warning message
"warning: MATLAB connector is not running." when doing zooming my graphics.
There are very little info I can find on this warning. Can anyone help to point me to the possible cause.
Here is a screen shot of the command window:

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Yukta Maurya
Yukta Maurya 2022-5-24
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Yukta Maurya
Yukta Maurya 2022-5-24
Title
Why do I receive the warning "Warning: MATLAB Connector is not running" for my standalone application in MATLAB R2021a?
Question
For a custom application, the following warning messages appear in the command window, both within MATLAB environment as well as in the compiled application using MATLAB Compiler,
> In message.publish
In matlab.graphics.internal/FigureToolstripManager/updateActions (line 23)
In matlab.uitools.internal.FigureToolManager>locUpdateUndoUI (line 78)
In matlab.uitools.internal.FigureToolManager>locCommandStackChanged (line 58)
In matlab.uitools.internal.FigureToolManager>@(o,~)locCommandStackChanged(o,hThis) (line 45)
In matlab.uitools.internal.uiundo/CommandManager/add
In uiundo (line 26)
In zoom>localCreate2DUndo (line 1823)
In zoom>localZoomFactor2D (line 988)
In zoom>localApplyZoomFactor (line 853)
In zoom>localButtonWheelFcn (line 895)
In zoom>@(obj,evd)localButtonWheelFcn(obj,evd,hMode) (line 552)
In uiwait (line 81)
In Bueno (line 50)
Warning: MATLAB Connector is not running.
Why do I receive the warning "Warning: MATLAB Connector is not running" for my standalone application in MATLAB R2021a?
Answer
The issue was not reproducible in our side. However, adding the following line of code,
connector.ensureServiceOn;
before the call to function 'uiwait' the warning disappeared for the customer.
Bruno Luong
Bruno Luong 2022-5-24
In my case it is not clear if there is an uiwait.
However it happens that I define my own ActionPostCallback of zoom and pan objects
zoomh = zoom(figh);
panh = pan(figh);
pan(figh,'off');
set(zoomh, 'ActionPostCallback', @CurvePreview_ZoomPostCallBack);
set(panh, 'ActionPostCallback', @CurvePreview_ZoomPostCallBack);
I figure out to turn off the warning by
warning('off','MATLAB:connector:connector:ConnectorNotRunning');
I'll try to replace it with
connector.ensureServiceOn;
to see how it goes

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