In this particular case, Simulink Coder or Simulink Embedded Coder do not generate code for main functions that allow programs to take input values. Therefore this executable was built with a modified main.c file, where code for inputs must have been added to the main function (args c, args v[], and subsequent logic). for this functionality to be present.
Possible solution
The most likely issue is that the main function is not converting the char input to double correctly. Check out this external link for clues on how to fix it:
