请教如何用patran划分该平板模型的网格

蚕宝宝吃桑叶

有一矩形平板，平板所在平面中有两条相交的曲线，如下图所示

两条曲线上已均布种子（mesh seed），且种子在交点处耦合。对该平板画网格，要求平板网格节点与曲线上的种子耦合。
我将两曲线与平板所在面联结（associate），再用四边形单元对平板画网格，不过出现了下面的错误，没能生成网格
$# Warning reported from application MSH
$#     Unknown fatal failure in the paver.
$# Warning reported from application MSH
$#     Trying to create p-element mesh.
$# Warning reported from application MSH
$#     Unknown fatal failure in the paver.
$# Warning reported from application MSH
$#     Trying to mesh in parametric space.
$# Question from application FEM
$#     The Mesher could not complete the mesh on Surface 1.
$# Would you like to retry using TRI elements?"
$? YES 2008020
$# Warning reported from application MSH
$#     Unknown fatal failure in the paver.
$# Warning reported from application MSH
$#     Trying to create p-element mesh.
$# Warning reported in application MSH by application VEC
$#     Vector angle calculation failed.
$# Warning reported from application MSH
$#     Trying to mesh in parametric space.
$# Warning reported in application MSH by application FEM
$#     The Mesher could not complete the mesh on Surface 1.
$# Try modifying element edge length by changing the seed definition
$#  or global edge length.
$# Paver failed to mesh the following surfaces: Surface 1 1.

求教各位大大，有什么方法能画出该平板的网格？万分感谢谢！

KF.lying

上文件...

蚕宝宝吃桑叶

终于把网格画出来了

不过又有了一个新问题：这个网格是在模型一（见附件plate_1.db）的基础上画出来的，而几乎相同的模型二（见附件plate_2_fail.db)就生成不了网格。
模型二与模型一的唯一区别就是多了几个毫不相关的点。请教各位大大，这是为何？