At least one connector on the highlighted element is currently assigned to the [Element Name]. In general items shouldn't be assigned to the Default Systems, but should be assigned as equipments or elements of a non-default system. Click the More Info button below for additional information on System Creation.
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 25.3.0.0 (25.3.0.0)
Syntax
C#
public static FailureDefinitionId ElementAssignedToDefaultSystem { get; }