Curve.OffsetMany

Hi Everyone, As you can see I have a spiral curve, drawn and Corridor-ed in Civil3D, I then extracted a corridor point report and loaded it into dynamo. I am trying to offset the curve but keep getting a “WIRE_BRANCHED” error in the Curve.OffsetMany node. Please may you help me to rectify this problem. Thank you.


Does this also happen when you offset > 0?