The setting for calculation of Volume Computations is not on. The analysis model produced will be approximate without the computation of Areas and Volumes
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 26.2.0.0 (26.2.0.0)
Syntax
C#
public static FailureDefinitionId ComputeRoomVolumeNotCheckedWarn { get; }