'InitFcn' callback error

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Mariam Dabbous 2020-3-1

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/508403-initfcn-callback-error

评论： Walter Roberson 2022-6-8

采纳的回答： Samuel Folorunsho

I was trying to design and tune a MPC controller for a MIMO system and I keep getting the following error.

This is my Simulink block diagram:

When I right-click and select model properties, callbacks, and 'InitFcn', this is what I get:

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Jonah Embry-Seckler 2020-4-13

Additionally, the exact error appears to occur on line 14 in this line:

mpcobj = slResolve(mpcobjname,blk)

slResolve cannot resolve mpc1. What is slResolve? It doesn't appear to be a standard Matlab function based on my google searches.

Walter Roberson 2021-5-29

slResolve() is probably the internal Simulink symbol resolution; https://www.mathworks.com/help/simulink/ug/resolving-symbols.html

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采纳的回答

Samuel Folorunsho 2021-6-8

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/508403-initfcn-callback-error#answer_719690

The probelem is that you did not save the mpc controller as a mat file that could be called once you exit the designer. So once you clear your workplace , the exported controller is no longer available on the workplace resulting in the error. To resolve this, you will need to:

Save the controller after exporting it : save('mpc1.mat','mpc1'). Here mpc1 is the name of the controller as speficied by you while designing it
Include the code to call the saved controller in your MATLAB file: load('mpc1'). This will load the controller into your workspace and your model will run without the error.

I hope this helps

reference: https://www.mathworks.com/matlabcentral/answers/403735-how-to-save-mpc-model-predictive-controller-to-be-used-later-on-the-error-message-is-attached