Protect model incompatible global variable error after changing the variable value

I select a structure as a tunable parameter of a protect model, the protect model runs well as the structure remains unchanged. Butthe protect model cannot run as soon as I change the value of the structure element, and an error: "One or more global variables used by protected model 'D:\protect model\CarModel1_1_protected2\CarModel_Protected.slxp" are incompatible with the variables that existed when the protected model was created. Incompatible global variables: CarWheel." occured. What should I do to solve this?

Answer 1

[Meet]

Hi @Haotian,

This error can occur if parameters are only in the function's workspace (not the base workspace) or if there is a mismatch in parameter dimensions between when the model was protected and when it is used. To fix this, use the below code snippet and ensure parameter dimensions match.

assignin('base', 'varName', varName)

For more detailed information, please refer to this MathWorks article: https://www.mathworks.com/matlabcentral/answers/439026-why-am-i-getting-an-incompatible-global-variables-after-creating-a-protected-reference-model

Hope this helps!