Run-Run join is not allowed of they have same "Start With Riser"/"End With Riser" configuration at the joined end.

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

Syntax

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

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

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

See Also