Shell "more than one constraint" error

[kinping]

I am trying to model a geodesic dome, to exploit the shear strength of concrete panels.But I have problem I can't get my head around and it's driving me nuts!

The panels are membrane elements so bending stresses are removed. Each panel is constrained from out of plate displacement using plate constraints (auto).

Panels are connected together using links with UX,UY, and UZ fixed, and rotations free.

When running analysis I get the error "more than one constraint, and/or substructure external connection is applied to DOF UZ at joint 421".

I have other models that don't have this problem, just the model as this annoying error. Any ideas? would really appreciate and help, thank you.

 

[IJR]

Find Joint 421

zoom into it.

Have a look at all shells or frames or restraints connected to the joint

YOu will find there is something wrong there.

The error you received occurs whenever you copy or replicate or mirror many elements at once. Usually you copy something that should not be there.