求助：如何得到准确的机械特征呢

求助：如何得到准确的机械特征呢
在CAA中Mechanical Modeler-》Naigating a Part Document这个例子里不管是用CATIDescendants还是CATIPartRequest这个接口，再用CATIBodyRequest 这个接口取特征集合。结果如下：Using CATIDescendants The list of Body Features: , has 3 element(s) Body.3 E_FAIL for GetResult PartBody Count of elements in the result list=5 Solid.1, its topological result is with the following tag : 474 Sketch.1, its topological result is with the following tag : 263 Point.5, its topological result is with the following tag : 10351 Sketch.3, its topological result is with the following tag : 10507 Solid.1, its topological result is with the following tag : 10543 Body.2 Count of elements in the result list=0。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。可是这里得到的特征和实际的不符合啊，例如Solid.1, its topological result is with the following tag : 474这行里得到的是Solid.1，并没有pad.1之类的出现。我用另外一个文件实验了一下，用两个草图做了两个pad，我不会贴图，相信大家可以想象出来的吧，但是得到的结果是： The list of Body Features: , has 1 element(s) 零部件几何体 Count of elements in the result list=3 实心.1, its topological result is with the following tag : 780 草图.1, its topological result is with the following tag : 263 草图.2, its topological result is with the following tag : 614如果把草图也算在内的话，至少是4个元素啊，这里怎么搞的呢，有什么方法可以得到pad.1,pad.2，这样我可以用CADIPad接口去修改pad参数。各位高手指点一下。谢谢