Customize Diagnostic Messages

TheDiagnostic Viewerdisplays the output of MATLAB^®error functions executed during simulation.

You can customize simulation error messages in the following ways by using MATLAB error functions in callbacks, S-functions, orMATLAB Functionblocks.

This example shows how to can customize the MATLAB functioncheck_signalto display the textSignal is negative.

In the MATLAB Editor, create a function to display custom text.

function y = check_signal(x) if x < 0 error('Signal is negative'); else y = x; end

Simulate the model.
A runtime error appears and you are prompted to start the debugger. ClickOK.
To view the following error inDiagnostic Viewer, close the debugger.

To create hyperlinks to files, folders, or blocks in an error message, include the path to these items within customized text.

Example error message	Hyperlink
`error ('Error reading data from "C:/Work/designData.mat"')`	Opens`designData.data`in the MATLAB Editor.
`error ('Could not find data in folder "C:/Work"')`	Opens a Command Window and sets`C:\Work`as the working folder.
`error ('Error evaluating parameter in block "myModel/Mu"')`	Displays the block`Mu`in model`myModel`.

This example shows how to can customize the MATLAB functioncheck_signalto display a hyperlink to the documentation forfind_system.

In the MATLAB Editor, create a function to display custom text.

function y = check_signal(x) if x < 0 error('See help for find_system'); else y = x; end

Simulate the model.
A runtime error appears and you are prompted to start the debugger. ClickOK.
To view the following error inDiagnostic Viewer, close the debugger.

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