creating uncertainty system model using ureal function

Hell every body

I have problem to creat a matlab function with uncertainty prameters in a MATLAB FUNCTION, any body have an idea how to use the (UREAL) function in sinmulink MATLAB FUNCTION block.

it give this error

The 'ureal' class does not support code generation.

Function 'Update Plant Model' (#25.331.372), line 13, column 7: "ureal('R_unc',20,'Percentage' ,[-20 +20])" Launch diagnostic report.

I inclouded the code and the simulink model.

Thank you

[Walter Roberson]

https://www.mathworks.com/help//robust/ref/ureal.html

ureal is not documented as supporting code generation.