Hi Peter, 

I think deleting the bottom rail then adding beams can be my next move! 

I'm trying to get the mesh right for this model now but still is not working, its now giving me the error that my node count is higher than 32k. Both my elements and nodes are less than 32k combined. I've seen your other thread about updating the geometry from source but still not working, I've shut the program down and opened it back up as well as clearing data and still is not working. What is wrong with the model?

Kind Regards