The connected fitting(s) cannot successfully change to the new slope value. You may try to disconnect the connections on the fitting(s) and try again.
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 26.2.0.0 (26.2.0.0)
Syntax
C#
public static FailureDefinitionId FabricationPartCannotChangeSlopeError { get; }