terminate called after throwing an instance of 'pybind11::cast_error' what(): return_value_policy = copy, but type is non-copyable! (#define PYBIND11_DETAILED_ERROR_MESSAGES or compile in debug mode for details) Aborted (core dumped)

[kefeimo]

======== Your Input Here: ==(Master-)======

0.843 0
terminate called after throwing an instance of 'pybind11::cast_error'
what(): return_value_policy = copy, but type is non-copyable! (#define PYBIND11_DETAILED_ERROR_MESSAGES or compile in debug mode for details)
Aborted (core dumped)

Afect version

0.3.0 (after adopting the newer version of Pybind11)

Note:

The command went through and took effect.

[wangyanbao666]

Hi may I know which version did you use for pybind11? I have upgraded to the latest pybind11 version but still got the error.

[kefeimo]

Hi @wangyanbao666, thanks for your interests in this issue. The pybind version is v2.9.2. (Note that the build process uses the pybind source code directly at /deps/pybind11 (pybind11 @ 338d615,) for more detailed about build, please see Notes-on-Packaging.md.

As a walkaround, you may try dnp3-py < 0.3.0 (i.e., pip install dnp3-python==0.2.3b3), which support python 2.8, 3.9, 3.10.

The root cause of this issue is the pybind11 being used does not support the C++ source code (i.e., dnp3 @ 7d84673) after Python 3.11. Note that the elements play essential roles here are C++ Opendnp3 code, pybind11, cmake, python, and ancilary biding code. The solution might require either updating the Opendnp3 C++ source code (along with ancillary binding code) or utilizing a suitable pybind11 that is compatible with both Python 3.11 (along with the cmake version) which can properly interpret the C++ code.

[wangyanbao666]

Thanks for your reply and the issue has been solved now!

[kefeimo]

@wangyanbao666, good to know that the issue is resolved. Would you mind sharing what's taken action that resolved the problem?

[zagor]

FYI I combined patches by @shawgree and @bbarcklay with modern pybind11 into a dnp3-python that builds and runs with Python 3.11: https://github.com/zagor/dnp3-python

[kefeimo]

FYI I combined patches by @shawgree and @bbarcklay with modern pybind11 into a dnp3-python that builds and runs with Python 3.11: https://github.com/zagor/dnp3-python

@zagor, thanks for sharing the fix. It works on my end.

@craig8, I verified the fix on py3.11 py3.10 (PR: #47)
Note: for a complete PR, we need to update the pybind11 submodule tag (PR: VOLTTRON/pybind11#10)