Family '[Family Name]' contains unattached voids that can't be combined for cutting. Try fixing the voids or unset the Cut with Voids parameter in the family.
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 26.1.0.0 (26.1.0.34)
Syntax
C#
public static FailureDefinitionId FamilyBadUnattachedVoids { get; }