Hi @keuj.84,
it seems that the error results from the fact that you are modifying the cross section which does not exist and then there are errors when visualizing the cross section. If you plug a default cross section into the Modify Cross Section component then you should be able to see all the beams in the BeamView.
hi @keuj.84, thats what I assumed. We will try to fix the component in the future release so that there is always a default cross section in the ModifyCrosSec.