The Dynamo - Optimo - Robot workflow is something a bit hard to solve on the first attempt, but you got already some result. I worked on the same thing at the end of last year, comparing robot results with the Dynamic Relaxation ones. With the new versions of Dynamo and Robot something seems changed, so I tried to solve your problem but I’ve recieved some new errors. Since I’m currently working on Structural Optimization I’ll help you on that, hopefully we’ll make it work soon. Could you please attach you .dyn?