Description
Before submitting the issue
- I have checked for Compatibility issues
- I have searched among the existing issues
- I am using a Python virtual environment
Description of the bug
I'm encountering an issue with DPF where only the displacement result is extractable from a large .rst file. Attempting to extract any other result (e.g., contact_total_stress) throws a DPFServerException, even though the results are listed in available_results.
Steps To Reproduce
Code to reproduce
import os
from ansys.dpf import core as dpf
# Path to the .rst file
filepath = r"L421_break_in_rst_2.rst"
# Set up the DataSources object and load the .rst file
ds = dpf.DataSources()
ds.set_result_file_path(filepath, key="rst")
# Create a model from the DataSources
model = dpf.Model(data_sources=ds)
# Retrieve and print available results
available_results = model.metadata.result_info.available_results
print(available_results)
model.results.contact_total_stress().eval()
The file is of bigger size(around 5gb).
The output of the above code is
[AvailableResult<name=displacement>,
AvailableResult<name=reaction_force>,
AvailableResult<name=elemental_summable_miscellaneous_data>,
AvailableResult<name=element_nodal_forces>,
AvailableResult<name=stress>,
AvailableResult<name=stress_1>,
AvailableResult<name=stress_2>,
AvailableResult<name=stress_3>,
AvailableResult<name=stress_intensity>,
AvailableResult<name=stress_eqv>,
AvailableResult<name=elemental_volume>,
AvailableResult<name=stiffness_matrix_energy>,
AvailableResult<name=artificial_hourglass_energy>,
AvailableResult<name=thermal_dissipation_energy>,
AvailableResult<name=kinetic_energy>,
AvailableResult<name=co_energy>,
AvailableResult<name=incremental_energy>,
AvailableResult<name=elastic_strain>,
AvailableResult<name=plastic_strain>,
AvailableResult<name=thermal_strain>,
AvailableResult<name=thermal_strains_eqv>,
AvailableResult<name=swelling_strains>,
AvailableResult<name=element_euler_angles>,
AvailableResult<name=elemental_non_summable_miscellaneous_data>,
AvailableResult<name=structural_temperature>,
AvailableResult<name=contact_status>,
AvailableResult<name=contact_penetration>,
AvailableResult<name=contact_pressure>,
AvailableResult<name=contact_friction_stress>,
AvailableResult<name=contact_total_stress>,
AvailableResult<name=contact_sliding_distance>,
AvailableResult<name=contact_gap_distance>,
AvailableResult<name=total_heat_flux_at_contact_surface>,
AvailableResult<name=contact_status_changes>,
AvailableResult<name=fluid_penetration_pressure>]
DPF throws exceptions when extracting all results except for displacement.
model.results.stress().eval()
Output of the above line
Traceback (most recent call last):
File "c:\Users\sandeep\Documents\PyDPF\scripts\DpftoCax\user\results_extraction.py", line 21, in <module>
model.results.stress().eval()
File "c:\Users\sandeep\Documents\PyDPF\py312\Lib\site-packages\ansys\dpf\core\dpf_operator.py", line 809, in eval
return self.outputs._outputs[0]()
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "c:\Users\sandeep\Documents\PyDPF\py312\Lib\site-packages\ansys\dpf\core\outputs.py", line 103, in __call__
return self.get_data()
^^^^^^^^^^^^^^^
File "c:\Users\sandeep\Documents\PyDPF\py312\Lib\site-packages\ansys\dpf\core\outputs.py", line 82, in get_data
output = self._operator.get_output(self._pin, type_output)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "c:\Users\sandeep\Documents\PyDPF\py312\Lib\site-packages\ansys\dpf\core\dpf_operator.py", line 591, in get_output
internal_obj = type_tuple[1](self, pin)
^^^^^^^^^^^^^^^^^^^^^^^^
File "c:\Users\sandeep\Documents\PyDPF\py312\Lib\site-packages\ansys\dpf\gate\generated\operator_capi.py", line 422, in operator_getoutput_fields_container
raise errors.DPFServerException(sError.value)
ansys.dpf.gate.errors.DPFServerException: S:44<-mapdl::rst::S:67<-, failed to read stressesfrom rst file.
Which Operating System causes the issue?
Windows
Which DPF/Ansys version are you using?
DPF Server 2025.1.pre0
Which Python version causes the issue?
3.12
Installed packages
annotated-types==0.7.0
ansys-dpf-core==0.13.8
Editable install with no version control (ansys-dpf-server_2025_1_pre0==2025.1rc0)
-e c:\users\sandeep\documents\pydpf\ansys_dpf_server_win_v2025.1.pre0
certifi==2025.4.26
charset-normalizer==3.4.2
colorama==0.4.6
contourpy==1.3.2
cycler==0.12.1
fonttools==4.58.1
grpcio==1.72.1
idna==3.10
importlib_metadata==8.7.0
Jinja2==3.1.6
kiwisolver==1.4.8
llvmlite==0.44.0
MarkupSafe==3.0.2
matplotlib==3.10.3
numba==0.61.2
numpy==2.2.6
packaging==25.0
pillow==11.2.1
platformdirs==4.3.8
pooch==1.8.2
protobuf==6.31.1
psutil==7.0.0
pydantic==2.11.5
pydantic-settings==2.9.1
pydantic_core==2.33.2
pyparsing==3.2.3
python-dateutil==2.9.0.post0
python-dotenv==1.1.0
pyvista==0.45.2
requests==2.32.3
scooby==0.10.1
setuptools==80.9.0
six==1.17.0
tqdm==4.67.1
typing-inspection==0.4.1
typing_extensions==4.14.0
urllib3==2.4.0
vtk==9.4.2
wheel==0.45.1
zipp==3.22.0