定义属性出错，如何解决？

will0932

Warning reported from application APP INTERFACES
$#     No element properties have been assigned to the element with id = 20361
这个是我在给划分好网格后的平面，定义板的属性时，系统给出的出错信息，就是这个单元和这个平面没有关联，我想把这个单元和平面Associate时，又给出下面信息$# 0 node(s) have been associated to vertices.
$# 1 node(s) are already associated to edges.
$# 0 node(s) have been associated to edges.
$# 1 node(s) are already associated to surfaces interior.
$# 0 node(s) have been associated to surfaces interior.
$# 0 node(s) associated to 1 surface(s):  Surface 20262，这个平面号是20262。
那位高手能帮忙解决一下，主要就是在网格划分好后，定义属性时，该几何体内的部分单元和这个几何体不关联，其他单元属性都定义成功。怎么给那些不成功的单元定义属性？谢谢