Composition change in a stream of HYSYS from MATLAB

The goal is to write a MATLAB code which runs a script in order to manipulate a stream composittion in HYSYS. This can be done by doing the following procedure:

First a script should be made in HYSYS (Tools -> Script Manager -> New)

Then, manually change the stream composition and stop recording the script.

There will be an *.SCP file in the route you were working.

By opening the SCP file, we can see where are the locations of the new composition values.

Using the "fseek" and "fwrite" commands in MATLAB, the desired values could be substituted.

Now we can run the script from MATLAB and see the changes in HYSYS file