Surface intersection

Hi all. i want to create this simple shape

(sorry for pic quality)
how can I avoid from this problem in this intersection part?

Thanks.

I used 2 rail sweep for left part, then i mirrored it.

Hi Eakan - see the attached file - Sweep1 with History allows you to make changes until you like it.
Loop_Sweep1.3dm (94.5 KB)

-Pascal

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thanks, Pascal