Set the curves into a free form Rebar. Will throw exception if the rebar has valid constraints. 
Namespace: Autodesk.Revit.DB.Structure
Assembly: RevitAPI (in RevitAPI.dll) Version: 24.0.0.0 (24.0.0.0)
Since:  2018 
Syntax
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Parameters
- curves
 - Type: System.Collections.GenericIListCurveLoop
Each curve loop represents a bar in the set. 
Return Value
Returns Success if everything is ok, otherwise the failure reason.Remarks
This function can fail due to following reasons:
- The array of CurveLoops is empty.
 - At least one CurveLoop is empty.
 - At least one CurveLoop contains an unbounded curve.
 - A rebar constructed from curves can't be bent according to the bending radius.
 
Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.ExceptionsArgumentNullException | A non-optional argument was null | 
| Autodesk.Revit.ExceptionsInvalidOperationException | This RebarFreeFormAccessor Rebar is constrained. |