Region Union error

Why am I getting this error? Can anyone help?

Well its not likely that you will get much help without a gh file. But it looks to me like your curves are not closed and I think that the region union uses closed curves. Just from the last picture that is. I would check that if I where you. :slightly_smiling_face:

assuming your starting Geometry contains a list of circles, and that you want to create the full-region-union of nodes (circles) + edges (connected offsets), this should work

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