MATLAB: How to associate a callback with the link status of a block in Simulink

callbackchangeerrorhooklibrarylinksimulinkstatuswarning

I have created some library blocks and I would like to issue a warning if the link to those blocks is ever broken. However, there does not appear to be a way to execute a callback based on the link status of a block.

Best Answer

The ability to create a callback for the link status of a block is not available in Simulink.

To work around the issue, you can evaluate the link status of all the model's blocks in a model callback, such as the Model Initialization function.

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MATLAB: Are block callbacks grayed out in certain blocks in Simulink

This occurs when the block is part of a library.

To unlock the callbacks, disable the library link by right clicking the block and selecting Link Options>Disable link.

MATLAB: What is status for

See movefile. Checking the status allows to check for errors:

[status,message,messageid] = movefile(File1, File2);
if ~status
  warning(message)
end

Now a warning appears, but it could be an error also. E.g. the destination could be write protected.

Equivalent for mkdir. Here the use of the status and the messages is explained in the documentation also: doc mkdir.

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MATLAB: Are block callbacks grayed out in certain blocks in Simulink

MATLAB: What is status for

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