Can not generate a UWG epw file

[Erikbeeren]

Hi,

I am trying to generate an EPW file with th DF Urban Weather generator.
In doing so I get the following error:

Runtime error (DivideByZeroException): Attempted to divide by zero.

Traceback:
line 86, in script
line 154, in average_shgc, “C:\Users\ebe.KNR\ladybug_tools\python\Lib\site-packages\dragonfly_uwg\properties\model.py”
line 35, in model_to_uwg, “C:\Users\ebe.KNR\ladybug_tools\python\Lib\site-packages\dragonfly_uwg\writer.py”
line 48, in run_uwg, “C:\Users\ebe.KNR\ladybug_tools\python\Lib\site-packages\dragonfly_uwg\run.py”

I do not understand why this is hapening. Below the json file:

GEUT_08.7z (164.3 KB)

[chris]

What a coincidence! The same bug was just reported here yesterday and I merged a fix a couple of hours ago:

UWG: modified epw missing or not generated

Hello to you both @chris @jgbrear, I really appreciate your response. The work that is being put into this product (LB) must be substantial and I want to thank you for making it available. I made the necessary adjustments removing the legacy model and creating a LBT Dragonfly 1.2.0 model. Everything seems in order but when I run the UWG I get the following error: [Prob3] Any thoughts as to why it is generating a “DivideByZeroException”? Thank you in advance, BF

Thanks for reporting!

[Erikbeeren]

Hi @chris,

I updated Ladybug and even added windows to the model. Now it generates an UWG.json but no EPW file. I tried to simplify the geometry but with no luck. Now I do not know what could be the issue here.
KRAP_19_3dmodel.gh (416.4 KB)
in.bat (398 Bytes) unnamed_uwg.json (3.9 KB)

[chris]

I should be better at parsing the error log from the UWG. Here’s the error that you get when you run the in.bat file:

It looks like your model is somehow getting “5C” assigned as its climate zone. I’ll see if I can investigate further. But you can always change this to 5A in you .json file and then rerun the .bat file.

[chris]

I just pushed a fix to the development version of the plugin, which should address this case:

fix(zone): Include support for ClimateZones 1B and 5C

You should be able to get it with the Versioner shortly. Thanks for reporting @Erikbeeren !

[Erikbeeren]

Hi @chris,

Again having trouble with generating UWG epw files. Error message:

The Urban Weather Generator Failed to run.

Somehow the batch file does not run correctly. The UWG.json is created but urban epw not.

DF.7z (310.8 KB)

Update:

Funny when I save the file as a DFJson and import this to generate a uwg epw file everything wirks fine.

Update:

I think I found the reason. When I defined the folder path the error occured.

[chris]

Thanks for reporting this, @Erikbeeren .

Hm. I think the original issue might actually have been related to the obstacle height that you have in your successful case there since I was able to get a math domain error in the wind profile calculation with your original uploaded file. I just pushed a fix that will catch the case of the failure of the UWG here:

fix(RWMDef): Catch the case of math domain errors in wind profile

You should be able to get it with the LB versioner in an hour or so if you still need it.