Let me add another approach that I've just learned.
There are many options to perform it but I’ve found this method very simple, flexible and self-explanatory.
In the example, watertank.oml is the master file.
changes the input parameters (controller gains)
runs (repeatedly) the file Watertank_parm.scm (slave)
collects results doing post-processing (plot) at the end.
I’ve created a quick video to summarize how to run the demo.
Present working directory must be where you save the files (the video shows how to select the pwd).
Otherwise use an absolute path in the oml file.