Explode geometry issue

Hello everybody ! i have an issue when i try to offset the boundary of a room with circular wall.
at first i get the boundaries then i use the PolyCurve.ByJoinedCurves node to join them, after that i make the offst and use Explode geometry node to have a multiple curves again ! but the forth curve is not an arc anymore and i get an error when it comes to generate Wall.ByCurveAndHeight, if some could help it would be great :slight_smile:

The curve appears to have become a nurbs curve. Try using a Curve.ApproximateWithLineAndSegments node to recreate as wall buildable geometry.

JacobSmall, Thank you very much it worked well with Curve.ApproximateWithArcAndLineSegments node !! even if there is a little bit of rumpus when visualising the final results