AttributeError: 'NoneType' object has no attribute 'Results'

[lucky_lin]

The simulation suddenly encountered this error, even though the same code was used previously without any issues.

import numpy
import s4l_v1.analysis as analysis
import s4l_v1.document as document
import s4l_v1.model as model
import s4l_v1.units as units
from s4l_v1 import ReleaseVersion
from s4l_v1 import Unit

try:
    # Define the version to use for default values
    ReleaseVersion.set_active(ReleaseVersion.version8_2)
    
    # Creating the analysis pipeline
    # Adding a new SimulationExtractor
    simulation = document.AllSimulations["0_17_35_29"]
    simulation_extractor = simulation.Results()

    # Adding a new EmSensorExtractor
    em_sensor_extractor = simulation_extractor["Overall Field"]
    em_sensor_extractor.FrequencySettings.ExtractedFrequency = u"All"
    document.AllAlgorithms.Add(em_sensor_extractor)

    # Adding a new CurrentExtractor
    inputs = [em_sensor_extractor.Outputs["EM Potential(x,y,z,f0)"], em_sensor_extractor.Outputs["J(x,y,z,f0)"]]
    current_extractor = analysis.extractors.CurrentExtractor(inputs=inputs)
    current_extractor.IsoSurfacePerCentThreshold = 30.0
    current_extractor.UpdateAttributes()
    document.AllAlgorithms.Add(current_extractor)

except Exception as exc:
    import traceback
    traceback.print_exc()
    # Reset active version to default
    ReleaseVersion.reset()
    raise(exc)

[Sylvain]

Hi,
You would get that error if there was no simulation named "0_17_35_29" in the currently opened document. Maybe you should check what simulations you have in your project and if you do have a simulation with that name?

One way to list all simulation names via python is to run something like:

for s in document.AllSimulations:
   print(s.Name)