Optimizing Cross Section

Hi!

I connected Optimize Cross Sections component to my karamba model and I am having a hard time unifying all the beams and all the columns to have identical cross sections (so I want all the beams to have one cross section and all the columns to have another cross section). I tried watching some youtube videos and googled around but I can only find old versions with components that now do not exist anymore. I attached below the file that I am working on. If anybody could help that would be great! 

Min