mesh not receiving nodes from polyline with magic wand

[Anonymous]

With the mesh selected and polygonal mode active
magic wanding to a spline used to form a contour line along the spline and at least accept the nodes the spline used
however if you refer to my screenshot it has just decided to make its own nodes randomly along the line as you can see the spline is selected and the nodes visible but the mesh intersections as seen in green do not at all line up with the nodes.

why does this work fine with a polyline but not with a spline?

[Anonymous]

Splines are funny things. I think the magic wand has trouble finding a mathematical curve to use to follow one.

Go to Options> Magic Wand settings and alter the Deviation from curve setting, or if on Linear Segments change the segment length setting.