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PAT analysis failed, warning - blank field

asked 2018-03-23 08:17:39 -0500

hribr gravatar image

updated 2018-03-25 12:18:31 -0500

I am trying to use WWR measure in PAT, but a warning appears:

IP: IDF line 307 Error detected in Object=FENESTRATIONSURFACE:DETAILED, named=SUB SURFACE 1, Field [Construction Name] is required but was blank.

I have a seed model that runs successfully in openstudio alone. A seed model have a construction name Okno: image description

Why is this field blank all of a sudden? PAT local results: image description

How can i fix this warning?

I am using OS 2.4.

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answered 2018-03-23 08:25:24 -0500

Is this the WWR measure you are using? https://bcl.nrel.gov/node/37880

If so, note the modeler description in the measure: "The construction chosen for the new window is defaulted to what is assigned to the space, or inherited from a higher level object, such as the building. If the baseline model uses hard assigned constructions you may not get the expected results."

It sounds like your seed model must have constructions assigned directly to the windows. Since there can be multiple window constructions, the measure doesn't know what to use for the new windows. If you instead set the window construction for the space/building in your seed model, it should work.

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Yes, I am using Window to Wall Ratio by Facade measure.

I do not understand exactly what I did wrong. I made my only window construction with Simple glazing system window material and put it in my only Construction set I use. I assign this Construction set to facility and to my only space. Is not that the way you set window construction for space/building?

hribr gravatar image hribr  ( 2018-03-23 13:59:26 -0500 )edit

@hribr the construction set has a dropzone fot both fixed and operable windows, as well as skylights and glass doors. New fenestration surfaces are fixed by default. Make sure you have a construction in the fixed dropzone.

Also make sure you are assigning for exterior vs. Interior boundary condition.

David Goldwasser gravatar image David Goldwasser  ( 2018-03-23 17:19:44 -0500 )edit

The construction was in the operable dropzone. I moved it to fixed and the measure works. Thank you very much.

hribr gravatar image hribr  ( 2018-03-24 12:51:09 -0500 )edit

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Asked: 2018-03-23 08:17:39 -0500

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Last updated: Mar 23 '18