Joined solid geometry cannot be copied as a whole. Instead, select the individual extrusions, etc., using Pick box or Ctrl-select and copy them.

public static FailureDefinitionId CannotCopyJoinedGeometry { get; }

Public Shared ReadOnly Property CannotCopyJoinedGeometry As FailureDefinitionId
	Get

public:
static property FailureDefinitionId^ CannotCopyJoinedGeometry {
	FailureDefinitionId^ get ();
}