export_field_file() fails when default variation_dict is used, and some design variables have "sweep" disabled

[nathmay]

Before submitting the issue

• I have searched among the existing issues
• I am using a Python virtual environment

Description of the bug

export_field_file() in pyaedt/modules/PostProcessor.py has an optional argument variation_dict. By default, export_field_file() assigns this as: variation_dict = self._app.available_variations.nominal_w_values_dict (unless user passes a custom dictionary)

This works when all the design variables in the project are enabled for sweep. However, if 'sweep' is disabled for one or more design variables, variation_dict should exclude those variables. Otherwise, ofieldsreporter.ExportToFile() (used in export_field_file()) throws an error. The issue is that app.available_variations.nominal_w_values_dict by default includes all design variables, even those with sweep disabled. To curcumvent this, I had to manually pass a custom variation_dict to export_field_file(), including only sweep enabled variables.

PS: I have not tested this for export_field_file_on_grid() - which is a similar function, and has a similarly defined variation_dict. So it could also have the same problem.

Steps To Reproduce

1. Extract the attached zip file
2. Open the archived aedtz project in AnsysEDT (I used version 2023R2)
3. Make sure datapoints.pts is in working directory, and run the following:

from pyaedt import Hfss
import os
app = Hfss()
options = ['IncludePtInOutput:=', False, 'RefCSName:=', 'CubeCS']
# The following will throw an error:
app.post.export_field_file("Volume_Loss_Density", filename=os.path.join(os.getcwd(),"loss.fld"), 
                           sample_points_file=os.path.join(os.getcwd(),"data_points.pts"), export_with_sample_points=options, 
                           intrinsics="2.45GHz")

The work around I found is to pass a variation_dict that includes only the sweep enabled variables. In this example, there are 12 design variables - but only one is sweep enabled: "cube_theta", set to "45deg" as nominal. So the following works:

app.post.export_field_file("Volume_Loss_Density", filename=os.path.join(os.getcwd(),"loss.fld"), 
                           sample_points_file=os.path.join(os.getcwd(),"data_points.pts"), export_with_sample_points=options, 
                           intrinsics="2.45GHz", variation_dict={'cube_theta': '45deg'})

Export_Field_Test.zip

Which Operating System are you using?

Windows

Which Python version are you using?

3.10

Installed packages

ansys-api-fluent==0.3.22
ansys-api-platform-instancemanagement==1.0.0
ansys-fluent-core==0.19.2
ansys-platform-instancemanagement==1.1.2
ansys-pythonnet==3.1.0rc3
anyio==4.2.0
argon2-cffi==23.1.0
argon2-cffi-bindings==21.2.0
arrow==1.3.0
asttokens==2.4.1
async-lru==2.0.4
attrs==23.2.0
Babel==2.14.0
beartype==0.17.0
beautifulsoup4==4.12.3
bleach==6.1.0
certifi==2023.11.17
cffi==1.16.0
charset-normalizer==3.3.2
click==8.1.7
click-plugins==1.1.1
cligj==0.7.2
clr-loader==0.2.6
colorama==0.4.6
comm==0.2.1
contourpy==1.2.0
cycler==0.12.1
debugpy==1.8.0
decorator==5.1.1
defusedxml==0.7.1
docker==7.0.0
et-xmlfile==1.1.0
exceptiongroup==1.2.0
executing==2.0.1
fastjsonschema==2.19.1
fiona==1.9.5
fonttools==4.47.2
fpdf2==2.7.7
fqdn==1.5.1
geopandas==0.14.2
grpcio==1.60.1
grpcio-health-checking==1.48.2
idna==3.6
imageio==2.33.1
importlib-metadata==7.0.1
ipycanvas==0.13.1
ipyevents==2.0.2
ipykernel==6.29.0
ipython==8.20.0
ipython-genutils==0.2.0
ipyvtklink==0.2.3
ipywidgets==7.8.1
isoduration==20.11.0
jedi==0.19.1
Jinja2==3.1.3
json5==0.9.14
jsonpointer==2.4
jsonschema==4.21.1
jsonschema-specifications==2023.12.1
jupyter-events==0.9.0
jupyter-lsp==2.2.2
jupyter_client==8.6.0
jupyter_core==5.7.1
jupyter_server==2.12.5
jupyter_server_terminals==0.5.2
jupyterlab==4.0.11
jupyterlab-widgets==1.1.7
jupyterlab_pygments==0.3.0
jupyterlab_server==2.25.2
kiwisolver==1.4.5
lxml==5.1.0
MarkupSafe==2.1.4
matplotlib==3.8.0
matplotlib-inline==0.1.6
mistune==3.0.2
msgpack-python==0.5.6
nbclient==0.9.0
nbconvert==7.14.2
nbformat==5.9.2
nest-asyncio==1.6.0
networkx==3.2.1
notebook==7.0.7
notebook_shim==0.2.3
numpy==1.26.0
openpyxl==3.1.2
osmnx==1.8.1
overrides==7.7.0
packaging==23.2
pandas==2.1.1
pandocfilters==1.5.1
parso==0.8.3
pillow==10.2.0
platformdirs==4.1.0
plumbum==1.8.2
pooch==1.8.0
prometheus-client==0.19.0
prompt-toolkit==3.0.43
protobuf==3.20.3
psutil==5.9.8
pure-eval==0.2.2
pyaedt==0.8.2
pycparser==2.21
pyedb==0.5.2
pyfluent==0.2.1
Pygments==2.17.2
pyparsing==3.1.1
pyproj==3.6.1
python-dateutil==2.8.2
python-json-logger==2.0.7
pytomlpp==1.0.13
pytz==2023.4
pyvista==0.42.2
pywin32==306
pywinpty==2.0.12
PyYAML==6.0.1
pyzmq==25.1.2
referencing==0.33.0
requests==2.31.0
rfc3339-validator==0.1.4
rfc3986-validator==0.1.1
rpds-py==0.17.1
rpyc==6.0.0
scikit-rf==0.31.0
scipy==1.12.0
scooby==0.9.2
Send2Trash==1.8.2
shapely==2.0.2
six==1.16.0
sniffio==1.3.0
soupsieve==2.5
SRTM.py==0.3.7
stack-data==0.6.3
terminado==0.18.0
tinycss2==1.2.1
tomli==2.0.1
tornado==6.4
traitlets==5.14.1
types-python-dateutil==2.8.19.20240106
typing_extensions==4.9.0
tzdata==2023.4
uri-template==1.3.0
urllib3==2.1.0
utm==0.7.0
vtk==9.2.6
wcwidth==0.2.13
webcolors==1.13
webencodings==0.5.1
websocket-client==1.7.0
widgetsnbextension==3.6.6
zipp==3.17.0

[Samuelopez-ansys]

@nathmay This is expected. If the nominal is not solved, the method fails because it is not solved this variation.

Check which variation is the nominal before calling this method:
app.available_variations.nominal_w_values_dict

This is the value that the method is using, if it is not {'cube_theta': '45deg'}, then you are passing a wrong value.

Thanks for the feedback

[nathmay]

Hi @Samuelopez-ansys , thanks for getting back! The nominal was in fact solved. This is what I meant by some variables having sweep disabled (sorry I didn't make that clear):

In this case, after the nominal configuration shown above is solved, I get the following from app.available_variations.nominal_w_values_dict:

{'cavity_width': '26.7cm',
 'cavity_depth': '27cm',
 'cavity_height': '18.8cm',
 'wg_width': '5cm',
 'wg_depth': '7.8cm',
 'wg_height': '1.8cm',
 'plate_rad': '12cm',
 'plate_t': '0.6cm',
 'plate_buffer': '1.5cm',
 'cube_dim': '4.8cm',
 'cube_theta': '45deg'}

The above causes export_field_file() to throw an error.
If I just pass variation_dict = {'cube_theta': '45deg'} (i.e. exclude the sweep disabled variables), then the exporting works as expected.

Hope this helps!

[gmalinve]

Hi @nathmay,

Thanks for addressing this issue.
This has now been resolved in #5230 and available in main.

Hope this helps,
Kind regards,

Giulia