Unable to Run PyDPF-Post Brief Demo

[git-hub-ansys-user]

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

Hello,
I am encountering an issue while attempting to run the brief demo from the PyAnsys documentation (https://post.docs.pyansys.com/version/stable/).

Steps To Reproduce

I receive the following error message:

Input

from ansys.dpf import post
from ansys.dpf.post import examples
simulation = post.load_simulation(examples.download_crankshaft())
displacement = simulation.displacement()
print(displacement)

Output

C:\temp_folder\pythonProjectAnsys.venv\Scripts\python.exe C:\temp_folder\pythonProjectAnsys\test_ansys_dpf.py
C:\temp_folder\pythonProjectAnsys.venv\Lib\site-packages\ansys\dpf\post\post_utility.py:173: Warning: Physics type is defaulting to 'mechanical'. Specify 'simulation_type' keyword if you want to use another type.
warnings.warn(
C:\temp_folder\pythonProjectAnsys.venv\Lib\site-packages\ansys\dpf\post\post_utility.py:183: Warning: Analysis type is set to 'static' as default. Specify the 'simulation_type' keyword if you want to use another type.
warnings.warn(
Traceback (most recent call last):
File "C:\temp_folder\pythonProjectAnsys.venv\Lib\site-packages\ansys\dpf\core\errors.py", line 123, in wrapper
out = func(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^
File "C:\temp_folder\pythonProjectAnsys.venv\Lib\site-packages\ansys\dpf\core\model.py", line 375, in time_freq_support
self._time_freq_support = timeProvider.get_output(0, types.time_freq_support)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\temp_folder\pythonProjectAnsys.venv\Lib\site-packages\ansys\dpf\core\dpf_operator.py", line 572, in get_output
internal_obj = type_tuple[1](self, pin)
^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\temp_folder\pythonProjectAnsys.venv\Lib\site-packages\ansys\dpf\gate\generated\operator_capi.py", line 599, in operator_getoutput_time_freq_support
raise errors.DPFServerException(sError.value)
ansys.dpf.gate.errors.DPFServerException: TimeFreqSupportProvider:6<-Data sources not defined

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "C:\temp_folder\pythonProjectAnsys\test_ansys_dpf.py", line 4, in
displacement = simulation.displacement()
^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\temp_folder\pythonProjectAnsys.venv\Lib\site-packages\ansys\dpf\post\static_mechanical_simulation.py", line 401, in displacement
return self._get_result(
^^^^^^^^^^^^^^^^^
File "C:\temp_folder\pythonProjectAnsys.venv\Lib\site-packages\ansys\dpf\post\static_mechanical_simulation.py", line 277, in _get_result
selection = self._build_selection(
^^^^^^^^^^^^^^^^^^^^^^
File "C:\temp_folder\pythonProjectAnsys.venv\Lib\site-packages\ansys\dpf\post\simulation.py", line 979, in _build_selection
time_freq_sets=[self.time_freq_support.n_sets]
^^^^^^^^^^^^^^^^^^^^^^
File "C:\temp_folder\pythonProjectAnsys.venv\Lib\site-packages\ansys\dpf\post\simulation.py", line 330, in time_freq_support
return self._time_frequencies
^^^^^^^^^^^^^^^^^^^^^^
File "C:\temp_folder\pythonProjectAnsys.venv\Lib\site-packages\ansys\dpf\post\simulation.py", line 315, in _time_frequencies
return self._model.metadata.time_freq_support
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\temp_folder\pythonProjectAnsys.venv\Lib\site-packages\ansys\dpf\core\errors.py", line 128, in wrapper
raise DPFServerException(details)
ansys.dpf.gate.errors.DPFServerException: TimeFreqSupportProvider:6<-Data sources not defined

Process finished with exit code 1

Which Operating System causes the issue?

Windows

Which DPF/Ansys version are you using?

Ansys 2024 R1

Which Python version causes the issue?

3.11

Installed packages

ansys-dpf-core 0.13.2 0.13.2
ansys-dpf-post 0.9.0 0.9.0
cachetools 5.5.0 5.5.0
certifi 2024.8.30 2024.8.30
charset-normalizer 3.4.0 3.4.0
colorama 0.4.6 0.4.6
google-api-core 2.22.0 2.23.0
google-api-python-client 2.151.0 2.152.0
google-auth 2.36.0 2.36.0
google-auth-httplib2 0.2.0 0.2.0
googleapis-common-protos 1.65.0 1.66.0
grpcio 1.67.1 1.67.1
httplib2 0.22.0 0.22.0
idna 3.10 3.10
importlib_metadata 8.5.0 8.5.0
numpy 2.1.3 2.1.3
packaging 24.2 24.2
pip 24.3.1 24.3.1
proto-plus 1.25.0 1.25.0
protobuf 5.28.3 5.28.3
psutil 6.1.0 6.1.0
pyasn1 0.6.1 0.6.1
pyasn1_modules 0.4.1 0.4.1
pyparsing 3.2.0 3.2.0
requests 2.32.3 2.32.3
rsa 4.9 4.9
scooby 0.10.0 0.10.0
setuptools 75.3.0 75.5.0
tqdm 4.67.0 4.67.0
uritemplate 4.1.1 4.1.1
urllib3 2.2.3 2.2.3
wheel 0.45.0 0.45.0
zipp 3.21.0 3.21.0

[ayush-kumar-423]

@PProfizi @rlagha can someone from your team please support here. I couldn't figure out the cause, the server is running (dpf.SERVER.info) and the RST file gets downloaded in a folder. As soon you fetch the model data, it error terminates. Free licenses are available.

[PProfizi]

Hello @ayush-kumar-423 , hello @git-hub-ansys-user,

I have not been able to reproduce with 2025R1. I am downloading 2024R1 to try with that. One solution though would thus be to upgrade to the latest standalone DPF available (see here on how to install DPF as a standalone application).

[ayush-kumar-423]

@PProfizi I haven't been able to reproduce this issue with 242 either. May I know why do you think standalone would resolve the issue?

[PProfizi]

@ayush-kumar-423 I just meant the user could switch to a more recent version of DPF using the standalone and could test whether this fixes the issue.
Of course I'll still try and reproduce with 2024R1 and see where the error can come from.

[PProfizi]

@ayush-kumar-423 @git-hub-ansys-user
I have not been able to reproduce the issue using the Python package versions and ANSYS version declared in the issue.
It looks to me like this is coming from the install.

I am interested in how you installed the packages. For example, I noted that you have numpy==2.1.3 installed despite ansys-dpf-core==0.13.2 requiring numpy<2.

[ayush-kumar-423]

@git-hub-ansys-user
Does the issue still persist?

[git-hub-ansys-user]

Hey,
Yes. The issue still persist. I’ve attempted to reinstall the packages multiple times, using both PyCharm and JupyterLab, but I keep encountering the same error messages.
Is there a way to verify if the port for licensing is open or potentially blocked? That might help narrow down the issue further.

[PProfizi]

Hello @git-hub-ansys-user,

You should have the Ansys Licensing Settings application installed for 2024 R1. There is an interface to test a combination of port and server.
As far as the current issue goes though, I do not think it is a problem with licensing.
I'll need to think of a way for you to provide me with more diagnostics.