Sweep does not generate edges

Hi, I am running on V5 and it happened that the Sweep1 command does not work properly as it does not build edges. It was working fine previously. I have checked it in V6 and that wokrs just fine. Is there any settings that controls the Sweep1?

i do not have a running V5 rhino but i think:
check _creaseSplitting command / option:


if you want to modify already created surfaces:
_split isocurve = yes, split = yes, snap to Knot

kind regards


Sweep1 is working correctly. As @Tom_P suggested the different results are probably the result of different CreaseSplitting settings.

Thanks the CreaseSplitting solved this.