Fortran simulation error in Simulink
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I have a legacy Fortran code that I want to simulate in Simulink using S function. I compiled all the Fortran subroutines and linked it to c-mex function. However, when I attempt to simulate the s function, it gives the following error.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/836005/image.jpeg)
Moreover, upon running the simulation, some of Fortran subroutines have worked properly by reading the variables stored in text file and subsequently writting the initialized variables into the new file.
I can't figure out where exactly the problem lies: in Fortran code or C mex function.
What does the above error imply?
Thankyou.
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