In Rhino 8 SR1 (8.1.23325.13001, 2023-11-21), rhinoscriptsyntax’s Arc helper functions seem to all raise a TypeError due to the TryGetArc function (TypeError: No method matches given arguments for Curve.TryGetArc: (<class 'float'>)). This can be resolved by not passing in Rhino.RhinoMath.ZeroTolerance, which seems to be redundant according to the RhinoCommon API.
I haven’t tried the Circle helper functions, but I suspect they might exhibit a similar issue.
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