UWG fails to run

grasshopper dragonfly
1
  1. Solution exception:The UWG failed to run:
    UWG model simulation failed.
    math domain error
    Traceback (most recent call last):
    File “C:\Program Files\ladybug_tools\python\lib\site-packages\uwg\cli\simulate.py”, line 50, in simulate_json_model
    uwg_model.simulate()
    File “C:\Program Files\ladybug_tools\python\lib\site-packages\uwg\uwg.py”, line 1352, in simulate
    self.RSM)
    File “C:\Program Files\ladybug_tools\python\lib\site-packages\uwg\urbflux.py”, line 38, in urbflux
    BEM[j].building.BEMCalc(UCM, BEM[j], forc, parameter, simTime)
    File “C:\Program Files\ladybug_tools\python\lib\site-packages\uwg\building.py”, line 539, in BEMCalc
    psychrometrics(self.indoor_temp, self.indoor_hum, forc.pres)
    File “C:\Program Files\ladybug_tools\python\lib\site-packages\uwg\psychrometrics.py”, line 52, in psychrometrics
    alpha = log(_pw)
    ValueError: math domain error
2

Hi @dyna ,

It looks like your EPW file has a set of conditions in it that’s causing the humidity to be a technically impossible number (but it’s probably a zero or something where we know there’s an appropriate solution). I just pushed a fix to the UWG assuming that this is the case:

And the fix should be available now with the LB Versioner component. If that does not address it, then please upload your EPW file and I’ll try to recreate the error.