Answer:
This message is usually displayed when the member dimensions do not correspond.
In the example model, the beam has a flange width of 200 mm, and the column support, of 160 mm.
This joint is not valid in the add-on module, as the flange width of the column should be at least as large as the flange width of the structural element to be connected. As soon as the cross-sections are defined according to this rule, the connection design can also be performed.
