rail and extrude problem

 From:  stan
594.1 
hi everyone!

really great program. some of my collegues (in architecture) are already using it, as well.

the first real problem ive got so far has to do with a gap i get when i try to extrude a closed spline or do a rail along a spline.

the solid object i get out of extruding is supposed to be bend. when zooming in closely it turns out to be kinda straight though. am i doing something wrong?

i attached some image that shows the gap.

thanks in advance stan
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