The highlighted column can't maintain attachment to the target. It will be treated as unattached until it can intersect.
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 26.4.0.0 (26.4.0.0)
Syntax
C#
public static FailureDefinitionId ColumnJoinNonhitFailure { get; }