The phases of the two surfaces you are merging do not overlap. You can continue the operation, or cancel it and select a different pair of surfaces.

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 24.0.0.0 (24.0.0.0)

Syntax

C#
`public static FailureDefinitionId SitePhasesDontOverlap { get; }`

Visual Basic
`Public Shared ReadOnly Property SitePhasesDontOverlap As FailureDefinitionId Get`

Visual C++
`public: static property FailureDefinitionId^ SitePhasesDontOverlap { FailureDefinitionId^ get (); }`

See Also