Variables in Simscape blocks don't get updated by a Matlab app

I am trying to create an exceutable file from a Matlab app. This app calls a Simulink model which includes Simscape blocks as well. There are some variables in the model which should be defined in the app. The problem that I have right now is that the variables in Simscape blocks don't get updated by the app while Simulink blocks do. I have created an example to better explain my problem. If you change the variables (e.g. Stiffness) you'll see that the output for the SImulink blocks changes but the output of the Simscape blocks are remained unchanged:

original example: https://www.mathworks.com/help/slcompiler/ug/deploy-a-simulation-with-simulink-compiler.html

modified example: attached

BTW, I have tried this solution and it didn't work.