difference between this rbe2 and rbe3

Rahul_P1

what is the difference between this rbe2 and rbe3 in hyper mesh and when it should be used?I have already seen in help it is just defining both but not comparing it and it's uses.

Rahul_P1

Please go through this webinar:

http://training.altairuniversity.com/2011/05/using-rbes-and-mpcs-in-radioss-free-recorded-webinar/

Altair Forum User

As I am doing Thermo-mechanical Analysis, in which I have to use RBE2 for rigid contact element and MPC at the same area (means on the same nodes for incompatible contact) but when I want to run both I got error of                   

Error Regarding Circular Dependancy

Now how can I solve my this error. We are using another Software too and in that it works. I have also checked depended nodes