Write output of To File block to MAT file incrementally during simulation of generated executable

I am generating an executable from my Simulink model in order to speed up execution. I output the data using a To File block. However, when I run the generated executable, I cannot access the data from the To File block until the very end of simulation. This is undesirable, since I am running a very long simulation and would like to see the intermediate results. Additionally, if the simulation is terminated early, all the data is lost. Is there a way to access the results while the executable is running? This is possible during Normal mode simulation by pausing the simulation.

Answer 1

[MathWorks Support Team]

When running a generated executable, the data written by the "To File" block cannot be accessed until the end of simulation because the file is open for writing. A simple workaround is to create a custom S-function that writes the desired outputs to a text file during simulation. To do so, you can use the "S-function Builder" block. I have attached a simple model containing an S-function that buffers data and writes to a file every "x" time steps, where "x" is specified as a parameter of the S-function. This is only a simple example, and you can modify it as fit for your model.