Problem with calling upon a Simulink model from a GUI

Question

Roy Veldhuizen 2012-6-29

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https://ww2.mathworks.cn/matlabcentral/answers/42386-problem-with-calling-upon-a-simulink-model-from-a-gui

I've got two simulink models, which are called by a GUI. I first developed the program, and i'm now implementing this in a GUI. When I'm calling, from a certain GUI function to my simulink model, called invcleanx.mdl, it gives the following error: Invalid Simulink object name: invcleanx. The error originates from the calling upon the workspace of the model, from:

hws = get_param(invclean,'modelworkspace') ;

I thought this might be an workspace issue, so I changed the callsign to the entire root, thus C:/Mydocuments/.../invcleanx

However, I still get the error:Invalid Simulink object name: C:\Documents and Settings\Administrator\Mijn documenten\My Dropbox\TU\Stage\Program\invcleanx.

So I guess, this is not the issue (or it is the wrong solution). I do not have the problem when I have the window of invcleanx.mdl open in Simulink, so apparently it is able to find if then. I now resolved the error by putting open_system('invcleanx') just before the reload command, but this is not favorable, since it takes time to load and open the model every time i run my calculation.

Am I not referring to my model in the correct way?

Thanks in advance,

Roy

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Answer 1

TAB 2012-6-29

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https://ww2.mathworks.cn/matlabcentral/answers/42386-problem-with-calling-upon-a-simulink-model-from-a-gui#answer_52173

In your question you have mentioned:

I do not have the problem when I have the window of invcleanx.mdl open in Simulink, so apparently it is able to find if then. I now resolved the error by putting open_system('invcleanx') just before the reload command, but this is not favorable, since it takes time to load and open the model every time i run my calculation

It is not at all possible to read/write/change the model from command line until it is opened or loaded in the memory. Model must be opened using open_system() or it must be loaded into memory using load_system() before doing any operation on it.

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Kaustubha Govind 2012-6-29

I agree with TAB. Note that load_system won't open the model visibly, but will keep it open in the background (unlike open_system). This might be faster than open_system.

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Answer 2

Ilham Hardy 2012-6-29

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https://ww2.mathworks.cn/matlabcentral/answers/42386-problem-with-calling-upon-a-simulink-model-from-a-gui#answer_52163

编辑：Ilham Hardy 2012-6-29

在 MATLAB Online 中打开

How about,

hws = get_param('invclean','ModelWorkspace') ;

instead of

hws = get_param(invclean,'modelworkspace') ;

HTH,

IH

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Roy Veldhuizen 2012-6-29

在 MATLAB Online 中打开

Hello Ilham,

Thank you for reply, but I'm not sure how to implement this, since i'm not typing invcleanx directly, but it is string which is saved. I replaced for clarity reasons, which is backfiring now =p This is the whole relevant story:

 function Toolex_OpeningFcn
filestruct.filename='estimationmodelgood';
 filestruct.filenamemodel='C:\Documents and Settings\Administrator\Mijn documenten\My Dropbox\TU\Stage\Program\invcleanx';
set(handles.output,'UserData',filestruct)
function Calculation_Callback
filestruct=get(handles.output,'UserData')
 hws = get_param(filestruct.filenamemodel,'modelworkspace')  ;
hws.reload;