关于NX10.0中ThroughCurves的问题，请大家帮助
通过创建各截面的样条曲线，再通过Through Curves方法创建曲面http://www.ugsnx.com/forum.php?mod=image&aid=94848&size=300x300&key=7bbf248052e5915f&nocache=yes&type=fixnone分别录制了C#和C++两种代码
用C#能够实现，但是同样原理，用C++就无法实现
C++中执行到CreateRuleCurveFeatureTangent这个函数就会报错，无法执行
C++代码如下：
std::vector<NXOpen::Features::Feature *> features1(1);
NXOpen::Features::StudioSpline *studioSpline1(dynamic_cast<NXOpen::Features::StudioSpline *>(workPart->Features()->FindObject("SPLINE(2)")));
features1 = studioSpline1;
NXOpen::Spline *spline1(dynamic_cast<NXOpen::Spline *>(studioSpline1->FindObject("CURVE 1")));
NXOpen::Curve *nullNXOpen_Curve(NULL);
NXOpen::CurveFeatureTangentRule *curveFeatureTangentRule1;
curveFeatureTangentRule1 = workPart->ScRuleFactory()->CreateRuleCurveFeatureTangent(features1, spline1, nullNXOpen_Curve, false, 0.0095, 0.5);
换成C#就能够执行成功
都是通过录制代码获得的，请大神帮忙看看到底是哪里出错了
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