maxwell 曲线画图

用曲线和直线花的闭合面无法生成面，老是提示 7Y>17=|  
    [error] Acis error: "Fail to cover lines. The given curve is open! Make sure the curve is closed " (9:23:12 AM  十月 25, 2012) #'<s/7;~  
    [error] Polyline1: CoverLine operation failed. (9:23:12 AM  十月 25, 2012) j$TTLFK1  
    [error] Acis error: "Fail to cover lines. The given curve is open! Make sure the curve is closed " (9:23:12 AM  十月 25, 2012) I
2R" Y<  
    [error] Polyline2: CoverLine operation failed. (9:23:12 AM  十月 25, 2012) qek[p_7  
之前用Equation based curve画图可 .. >hcze<^S  
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请问问题解决了吗？我也遇到了同样的问题

这个太难了

哈哈