At first I would advise you to define the placements according to the structural beam sections. Your project is a bit confusing. Additionally, to find the error, try to reduce your system. Keep it simple!
A look into your system makes it clear that the variable #WWEBM does not arrive in the cross section.
So I deleted the structure line and reapplied it to the axis.
SOFiPLUS(-X) > Structural line > select settings > rigt-click in the drawing area > Segment on Axis > Select axis A
I am attaching the simplified system. Now it’s up to you to work out the system.
Bridge 15-16.sofistik (155.5 KB)
Bridge 15-16.dwg (187.0 KB)
Best regards
Frederik Höller
Your SOFiSTiK Support Team