Dear Research...how to resolve this error in mat lab(2018a)...and simulation symbol is not availble in simulink?

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Saeed Mojtabazadeh

https://www.mathworks.com/matlabcentral/answers/349100-why-can-t-i-see-my-model-in-simulink-simulation

Ashraf A. Zaher

I came across these discussions:

https://www.mathworks.com/matlabcentral/answers/225970-how-do-i-resolve-advanced-graphics-rendering-error-prompt

https://stackoverflow.com/questions/53207077/matlab-opengl-warning

Hope this helps. Best wishes.