Hello Leonid,
Only one optimization region is currently allowed within Lumopt, so you may need to optimize these regions separately or make the opt region large enough to include both. Guilin is right that there is not really a physical limitation and so by modifying lumopt for it to understand how to handle the d_eps and\or gradient calculations I think you could get it work.
We cannot really support these type of updates to the code base, and I am not precisely clear on what would be required. It is an option given that lumopt is an open source python framework.
Best Regards,
You are navigating away from the AIS Discovery experience