[EnergyPlus_Support] Tubular daylight device error.

["Phil" <philcook76@xxxxxxxxxxx>]

I am using DesignBuilder and I am using the advanced feature of including an .idf file to allow me to use a Tubular Lightpipe. When I run it I get the following error which seems nonsensical. Any ideas why it is telling me the area of the pipe and dome/diffuser are different whilst showing me that they are the same? I have included the relevant section of .idf file below.

It may have something to do with the fact that I am modelling the roof as a plane with no ceiling and so the diffuser is in the roof plane, the dome is above the roof plane and the transition zone is the room below the roof as it is a single zone model.

Thanks,
Phil.
  

___ERROR MESSAGE____

 ** Severe  ** DaylightingDevice:Tubular = PIPE1:  Pipe and dome/diffuser areas are significantly different.
   **   ~~~   ** ...Pipe Area=[0.44]; Dome/Diffuser Area=[0.44].


___IDF FILE___

DaylightingDevice:Tubular,
Pipe1, !- Object Name
Dome1, !- Dome Name
Diffuser1, !- Diffuser Name
ReflectiveAluminum, !- Construction Name
0.750, !- Diameter [m] 
0.6, !- Total Length [m] (subtract zone lengths to get outdoor exposed length)
0.48, !- Effective Thermal Resistance [m2-K/W] between TubularDaylightDome and
78, !- Transition Zone 1 Name
; !- Transition Zone 1 Length [m]

FenestrationSurface:Detailed,
Dome1, !- Subsurface Name
TubularDaylightDome, !- Surface Type
ClearAcrylicDome, !- Construction Name (only 1 layer allowed in construction)
R_78_5_0_0, !- Base Surface Name
, !- Outside Face Environment (not allowed for TubularDaylightDome)
0.0, !- VF to Ground
, !- Window Shading Control (not allowed for TubularDaylightDome)
, !- Frame/Divider Name (not allowed for TubularDaylightDome)
1.0, !- Multiplier (must be 1.0 for TubularDaylightDome)
4, !- Number of Vertices
-5.662723, -5.355330, 7.072746,
-6.322723, -5.355330, 7.072746,
-6.322723, -6.014425, 7.107302,
-5.662723, -6.014425, 7.107302;

FenestrationSurface:Detailed,
Diffuser1, !- Subsurface Name
TubularDaylightDiffuser, !- Surface Type
FrostedAcrylicDiffuser, !- Construction Name (only 1 layer allowed in construction)
R_78_5_0_0, !- Base Surface Name
, !- Outside Face Environment (not allowed for TubularDaylightDiffuser)
0.0, !- VF to Ground
, !- Window Shading Control (not allowed for TubularDaylightDiffuser)
, !- Frame/Divider Name (not allowed for TubularDaylightDiffuser)
1.0, !- Multiplier (must be 1.0 for TubularDaylightDiffuser)
4, !- Number of Vertices
-5.662723, -5.355330, 6.872746,
-6.322723, -5.355330, 6.872746,
-6.322723, -6.014425, 6.907302,
-5.662723, -6.014425, 6.907302;



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