Unable to use coordinate_system operator for ansys-dpf-core>0.13.0

[WawrzJa00]

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

dpf.operators.result.coordinate_system() operator is not longer working after updating ansys-dpf-core to 0.13.1-0.13.8. Returns:

KeyError: "The operator CS doesn't exist in the registry. Check its spelling in the documentation or verify its availability in your loaded plugins. The current available operator names can be accessed using 'available_operator_names' method."

Forced to use 0.13.0 to make it work, which uses the old version of numpy<2.0.

Steps To Reproduce

Update ansys-dpf-core to 0.13.1-0.13.8 and run:
dpf.operators.result.coordinate_system()

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

python = "^3.12"
numpy = "<2"
pandas = "^2.2.3"
scipy = "^1.15.1"
pyvista = "^0.44.2"
ipykernel = "^6.29.5"
nbformat = "^5.10.4"
plotly = "^6.0.0"
xarray = "^2025.1.2"
scikit-guess = "^0.0.1a0"
scikit-learn = "^1.6.1"
ansys-dpf-core = "0.13.8"
netcdf4 = "^1.7.2"

[MeenaBytes]

@WawrzJa00 Could you please print the dpf server information and share here? This would happen only if you were using an old version of DPF server.

[PProfizi]

Hi @WawrzJa00 , hi @MeenaBytes ,
indeed it looks like the operator was changed in DPF 2025.1.pre1 to redirect to the internal CS operator. Before that it redirected directly to mapdl::rst::CS.
This would mean that for 2025.1.pre0 a recent PyDPF-Core ansys.dpf.core.operators.result.coordinate_system operator would not find CS, resulting in this error.
Apparently the case of retro-compatibility with older servers was not handled properly. I can take a quick look, but in the meantime a workaround is to modify ansys.dpf.core.operators.result.coordinate_system.py for it to initialize the class coordinate_system with mapdl::rst::CS instead of CS.
You could also switch to DPF 2025.1.pre1 if possible for you.