hi, everyone, please tell me what's the master node and the slave node? when I write def., the wrong info. come out and say: the master nodes unequal to slave nodes. how can i fix this problem.

thanks

Are you solving a conjugate heat transfer problem like having multiplte mesh domains

No. I am not sure if this problem is related to mesh size setting or not.

thanks

Please check if you have multiple surfaces on a solid or you have multiple solids