Sweep1 function with closed curve in grasshopper

Hi I am working on pipe shape making.

I cannot understand why sweep1 doesn’t work to closed curves

Does anybody know what the problem is?

sweep1 problem-1.3dm (563.0 KB)
sweep1 problem-1.gh (7.7 KB)

don’t know why sweep is failing, but if you want to sweep with circular-only sections you might use Pipe instead?

sweep1 problem-1_Re.gh (10.9 KB)

I tried pipe too but the pipe is not seamless

anyway thanks for your comment Inno!

try to make Periodic = True, it should work

Thanks it works!