Simulink Test: Avoid Model Rebuilds & Speed Up Testing

How can I avoid rebuilding my model each time I run a Simulink Test Real-Time test case?

department asked: 2021-08-27 programming , matlab , simulink , test , real-time , rebuild , slow , performance

Learn how to avoid rebuilding your Simulink model every time you run a test! Optimize your real-time testing with our expert tips and save valuable time. Read n

Expert Answer

John Michell answered . 2025-07-05 20:49:32

I have 2 workarounds for you that should allow you to avoid re-building.

1) Change "System Under Test"

If you just want to to define several test cases using the same exact model which will not change afterwards, in "System Under Test" you can use one of the following options under "Load Application From":

'Target application': specify the real-time mldatx file instead of the model, the mldatx file will be loaded to the target at the beginning of the test case if not already loaded

'Target computer': specify target name on which the real-time application is already loaded

2) Use iterations

If you want to define several test cases using the same model and wants to sweep parameters between test cases, you can use iterations to achieve this. Only the first iteration will trigger a build and load; all subsequent iterations will sweep parameters and start execution on the target directly. For more information on creating iterations.

Also, note that iterations can also be defined when specifying 'load application from' to 'Target application' or 'Target computer.

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