Why does the Simulink block mask initialization run twice?

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Jason Nicholson 2018-3-2

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https://ww2.mathworks.cn/matlabcentral/answers/386033-why-does-the-simulink-block-mask-initialization-run-twice

回答： Jason Nicholson 2018-3-21

If you are debugging a mask initialization, use the keyboard function to stop the code inside the Simulink block mask initialization. You'll notice that the mask is always run twice when a change is made to the mask. Why does the mask run twice?

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Answer 1

Jason Nicholson 2018-3-21

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https://ww2.mathworks.cn/matlabcentral/answers/386033-why-does-the-simulink-block-mask-initialization-run-twice#answer_311185

The initialization runs twice if "Icons & Ports"-->"Run initialization" is set to "On" or "Analyze" (assuming MATLAB detects the initialization needs to run). When the initialization runs twice, the order of execution seems to be: