求指导，关于Tie,The distance from the master surface is greater than.....

遇见了下面的问题，苦思冥想了好久也没有解决。ABAQUS 绑定约束 出现以下问题：
Slave surface assembly_set-2_cns_ is a node-based surface used with surface to surface approach. In order to obtain improved stress accuracy with this approach, an element-based surface should be used instead.
For *tie pair (assembly_set-2_cns_-assembly_set-1_cns_), adjustment was specified but no node was adjusted more than the adjustment distance = 2.22000e-16.
Slave node 3 instance part-1-1 will not be tied to the master surface assembly_set-1_cns_. The distance from the master surface is greater than the position tolerance value.
Slave node 4 instance part-1-1 will not be tied to the master surface assembly_set-1_cns_. The distance from the master surface is greater than the position tolerance value.
Slave node 6 instance part-1-1 will not be tied to the master surface assembly_set-1_cns_. The distance from the master surface is greater than the position tolerance value.

。。。。。。。。。。。。。。。还有很多行类似的warning。ps:图文无关，图不重要，看字