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vla-IntersectWith sometimes un-predictable?

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mdhutchinson
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vla-IntersectWith sometimes un-predictable?

Why is vla-IntersectWith sometimes un-predictable...?
passing in two objects (obj1 and obj2) or in the reverse order seem to yield different result. With two objects I am trying with it (a closed LWpolyline and a Region). One order yields more points then the other.

Why...
And how might i approach this to make certain I am getting the points I need?

What I am attempting is to automatically dimension the length, width and centroid of a 2d region object. The idea was to create a temporary bounding rectangle, do IntersectWith and then test the points found to get the four points I want - then pass these to the dimension command.
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