Plate Connection Issue (Plaxis 3D)

Hi All,

I have an issue with a connection of a vertical isolated plate with a slab.

We created a connection between them without any problem but when we tried to calculate then feedback window showed up with the following problem:

The only way seems to remove connection in order to calculate but this forces you to have a rigid connection between them.

Can anyone help us to solve this issue? We want to set a free degree of rotation between these two plates.

thanks in advance,

Francesc