Type 2 instability error, possible solution

[Anonymous]

Hi,
Robot is detecting type 2 instability at nodes 21, 78, 125 and 153 (UY direction) in the attached model.
I checked the displacement table and it is normal for the proposed model.

I would like to know how to resolve this warning.

Thank you!

[Krzysztof_Wasik]

Hi @Anonymous 

Connect supported column nodes with nearest slab nodes with rigid link (UX, UY and UZ blocked). It will remove instability.