Instance of family [Family Name] can't be updated because in nested family the column's base (Base Level + Base Offset) must be below its top (Top Level + Top Offset).
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 26.1.0.0 (26.1.0.34)
Syntax
C#
public static FailureDefinitionId InvalidSlantedColumnOffsetsInNestedFamily { get; }