Default parameters have incorrect values. One reason for failure might be an edge length that is too short (it's smaller than bent radius).
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 26.3.0.0 (26.3.0.0)
Syntax
C#
public static FailureDefinitionId DefaultParamaterValuesIncorrect { get; }