II order analysis-truss elements-beam joint

Hi,

I'm trying to develope a very simple case (attached below), to understand how beam-joints component works and how the second order analysis component works. I have different problems:

1) The second order analysis works only for beam elements, for truss elements (so defined thanks modify beam component) it doesn't work;

2) Changing diameters, not always the first order analysis works for Truss elements (so defined thanks modify beam component);

3) If I release moments to free nodes (using beam-joint components), the first order analysis doesn't work.

What am I doing wrong?

Thank you so much!

Valentina