Output data from a Matlab exe

I have an executable file which is generated from Simulink and runs on some rapid prototyping equipment. This takes input signals and outputs information to Adobe Flash for the user to see what is going on. This works fine

The system is run standalone so I would like to be able to send out data from the exe to a log file either continuously or in say 20 second chunks. So that if there is a problem then I can resolve it from the data files. I also want to post process the data to optimise the Simulink model further.

At the moment I would like to understand what is possible

Thanks

[Kaustubha Govind]

Paul: I'm confused with the question. If your Simulink executable already has the necessary inputs/outputs configured. Can you not edit the source code to add logging code and recompile it? Or did you want to write a Simulink block (perhaps an S-function) that logs the data, and have the executable generated automatically with the logging code?