ImportError: DLL load failed while importing cpp_ext

[wokequnimei]

When I used your latest pyxcp, I encountered the following problem:

The configuration I use is the previous pyxcp compatible version, as shown below：

I was excited when I learned about the new version of pyxcp, but was confused about how to use it. The new configuration system is how to configure 'can' to make 'Master' work.
Hope to get your reply, thank you very much！

[wokequnimei]

The problem I encountered is the same as the one in the link (#173) . I tried the corresponding solution in the discussion, but it didn't work.

[wokequnimei]

"D:\Program Files\Python310\python.exe" F:\New_pyxcp\pyxcp-master\pyxcp\scripts\xcp_examples.py
Traceback (most recent call last):
File "F:\New_pyxcp\pyxcp-master\pyxcp\scripts\xcp_examples.py", line 11, in
from pyxcp import console
File "D:\Program Files\Python310\lib\site-packages\pyxcp_init_.py", line 11, in
from .master import Master # noqa: F401, E402
File "D:\Program Files\Python310\lib\site-packages\pyxcp\master_init_.py", line 9, in
from .master import Master # noqa: F401
File "D:\Program Files\Python310\lib\site-packages\pyxcp\master\master.py", line 26, in
from pyxcp.daq_stim.stim import DaqEventInfo, Stim
File "D:\Program Files\Python310\lib\site-packages\pyxcp\daq_stim_init_.py", line 9, in
from pyxcp.cpp_ext import DaqList
File "D:\Program Files\Python310\lib\site-packages\pyxcp\cpp_ext_init_.py", line 1, in
from .cpp_ext import ( # noqa: F401
ImportError: DLL load failed while importing cpp_ext: 找不到指定的模块。

[christoph2]

pip install pyxcp does not work?
Otherwise, if you cloned/downloaded pyXCP, make sure to run pip install -e .
to correctly build the project -- pyXCP uses a bunch of C++ extensions, the missing cpp_ext is one of them.

Note: You should use in the new configuration system, to make it work run:

xcp-profile convert -c your_config_file.toml  -o pyxcp_conf.py

[wokequnimei]

PS F:\New_pyxcp\pyxcp-master> pip310 install pyxcp
Requirement already satisfied: pyxcp in d:\program files\python310\lib\site-packages (0.22.10)
Requirement already satisfied: toml<0.11.0,>=0.10.2 in d:\program files\python310\lib\site-packages (from pyxcp) (0.10.2)
Requirement already satisfied: tomlkit<0.13.0,>=0.12.5 in d:\program files\python310\lib\site-packages (from pyxcp) (0.12.5)
Requirement already satisfied: rich<14.0.0,>=13.6.0 in d:\program files\python310\lib\site-packages (from pyxcp) (13.9.4)
Requirement already satisfied: uptime<4.0.0,>=3.0.1 in d:\program files\python310\lib\site-packages (from pyxcp) (3.0.1)
Requirement already satisfied: pyserial<4.0,>=3.5 in d:\program files\python310\lib\site-packages (from pyxcp) (3.5)
Requirement already satisfied: python-can<5.0.0,>=4.2.2 in d:\program files\python310\lib\site-packages (from pyxcp) (4.5.0)
Requirement already satisfied: pyusb<2.0.0,>=1.2.1 in d:\program files\python310\lib\site-packages (from pyxcp) (1.2.1)
Requirement already satisfied: construct<3.0.0,>=2.10.68 in d:\program files\python310\lib\site-packages (from pyxcp) (2.10.70)
Requirement already satisfied: line-profiler-pycharm<2.0.0,>=1.1.0 in d:\program files\python310\lib\site-packages (from pyxcp) (1.2.0)
Requirement already satisfied: bandit<2.0.0,>=1.7.8 in d:\program files\python310\lib\site-packages (from pyxcp) (1.8.0)
Requirement already satisfied: pytz<2025.0,>=2024.1 in d:\program files\python310\lib\site-packages (from pyxcp) (2024.2)
Requirement already satisfied: mako<2.0.0,>=1.2.4 in d:\program files\python310\lib\site-packages (from pyxcp) (1.3.8)
Requirement already satisfied: traitlets<=5.11.2 in d:\program files\python310\lib\site-packages (from pyxcp) (5.11.2)
Requirement already satisfied: stevedore>=1.20.0 in d:\program files\python310\lib\site-packages (from bandit<2.0.0,>=1.7.8->pyxcp) (5.4.0)
Requirement already satisfied: PyYAML>=5.3.1 in d:\program files\python310\lib\site-packages (from bandit<2.0.0,>=1.7.8->pyxcp) (6.0.2)
Requirement already satisfied: colorama>=0.3.9 in d:\program files\python310\lib\site-packages (from bandit<2.0.0,>=1.7.8->pyxcp) (0.4.6)
Requirement already satisfied: line-profiler in d:\program files\python310\lib\site-packages (from line-profiler-pycharm<2.0.0,>=1.1.0->pyxcp) (4.2.0)
Requirement already satisfied: MarkupSafe>=0.9.2 in d:\program files\python310\lib\site-packages (from mako<2.0.0,>=1.2.4->pyxcp) (3.0.2)
Requirement already satisfied: packaging>=23.1 in d:\program files\python310\lib\site-packages (from python-can<5.0.0,>=4.2.2->pyxcp) (24.2)
Requirement already satisfied: typing_extensions>=3.10.0.0 in d:\program files\python310\lib\site-packages (from python-can<5.0.0,>=4.2.2->pyxcp) (4.12.2)
Requirement already satisfied: wrapt~=1.10 in d:\program files\python310\lib\site-packages (from python-can<5.0.0,>=4.2.2->pyxcp) (1.17.0)
Requirement already satisfied: markdown-it-py>=2.2.0 in d:\program files\python310\lib\site-packages (from rich<14.0.0,>=13.6.0->pyxcp) (3.0.0)
Requirement already satisfied: pygments<3.0.0,>=2.13.0 in d:\program files\python310\lib\site-packages (from rich<14.0.0,>=13.6.0->pyxcp) (2.18.0)
Requirement already satisfied: mdurl~=0.1 in d:\program files\python310\lib\site-packages (from markdown-it-py>=2.2.0->rich<14.0.0,>=13.6.0->pyxcp) (0.1.2)
Requirement already satisfied: pbr>=2.0.0 in d:\program files\python310\lib\site-packages (from stevedore>=1.20.0->bandit<2.0.0,>=1.7.8->pyxcp) (6.1.0)

[notice] A new release of pip is available: 23.0.1 -> 24.3.1
[notice] To update, run: D:\Program Files\Python310\python.exe -m pip install --upgrade pip
PS F:\New_pyxcp\pyxcp-master> xcp-profile convert -c your_config_file.toml -o pyxcp_conf.py
Traceback (most recent call last):
File "D:\Program Files\Python310\lib\runpy.py", line 196, in run_module_as_main
return run_code(code, main_globals, None,
File "D:\Program Files\Python310\lib\runpy.py", line 86, in run_code
exec(code, run_globals)
File "D:\Program Files\Python310\Scripts\xcp-profile.exe_main.py", line 4, in
File "D:\Program Files\Python310\lib\site-packages\pyxcp_init.py", line 11, in
from .master import Master # noqa: F401, E402
File "D:\Program Files\Python310\lib\site-packages\pyxcp\master_init.py", line 9, in
from .master import Master # noqa: F401
File "D:\Program Files\Python310\lib\site-packages\pyxcp\master\master.py", line 26, in
from pyxcp.daq_stim.stim import DaqEventInfo, Stim
File "D:\Program Files\Python310\lib\site-packages\pyxcp\daq_stim_init_.py", line 9, in
from pyxcp.cpp_ext import DaqList
File "D:\Program Files\Python310\lib\site-packages\pyxcp\cpp_ext_init_.py", line 1, in
from .cpp_ext import ( # noqa: F401
ImportError: DLL load failed while importing cpp_ext: 找不到指定的模块。

[wokequnimei]

I used 'pip install pyxcp', then run 'xcp-profile convert -c your_config_file.toml -o pyxcp_conf.py' but got an error

[christoph2]

The old error persists or is there a new one?

[wokequnimei]

The old error persists or is there a new one?

The old error persists，same error message

[christoph2]

It seems the former installation is still active in site-packages.
You may uninstall first:
pip uninstall pyxcp

[wokequnimei]

PS F:\New_pyxcp\pyxcp-master> pip310 uninstall pyxcp
Found existing installation: pyxcp 0.22.10
Uninstalling pyxcp-0.22.10:
Would remove:
d:\program files\python310\lib\site-packages\pyxcp-0.22.10.dist-info*
d:\program files\python310\lib\site-packages\pyxcp*
d:\program files\python310\scripts\pyxcp-probe-can-drivers.exe
d:\program files\python310\scripts\xcp-examples.exe
d:\program files\python310\scripts\xcp-fetch-a2l.exe
d:\program files\python310\scripts\xcp-id-scanner.exe
d:\program files\python310\scripts\xcp-info.exe
d:\program files\python310\scripts\xcp-profile.exe
Proceed (Y/n)? Y
Successfully uninstalled pyxcp-0.22.10
PS F:\New_pyxcp\pyxcp-master> pip310 install pyxcp
Collecting pyxcp
Using cached pyxcp-0.22.13-cp310-cp310-win_amd64.whl (1.3 MB)
Requirement already satisfied: pyserial<4.0,>=3.5 in d:\program files\python310\lib\site-packages (from pyxcp) (3.5)
Requirement already satisfied: mako<2.0.0,>=1.2.4 in d:\program files\python310\lib\site-packages (from pyxcp) (1.3.8)
Requirement already satisfied: python-can<5.0.0,>=4.2.2 in d:\program files\python310\lib\site-packages (from pyxcp) (4.5.0)
Requirement already satisfied: line-profiler-pycharm<2.0.0,>=1.1.0 in d:\program files\python310\lib\site-packages (from pyxcp) (1.2.0)
Requirement already satisfied: uptime<4.0.0,>=3.0.1 in d:\program files\python310\lib\site-packages (from pyxcp) (3.0.1)
Requirement already satisfied: pyusb<2.0.0,>=1.2.1 in d:\program files\python310\lib\site-packages (from pyxcp) (1.2.1)
Requirement already satisfied: toml<0.11.0,>=0.10.2 in d:\program files\python310\lib\site-packages (from pyxcp) (0.10.2)
Requirement already satisfied: construct<3.0.0,>=2.10.68 in d:\program files\python310\lib\site-packages (from pyxcp) (2.10.70)
Requirement already satisfied: rich<14.0.0,>=13.6.0 in d:\program files\python310\lib\site-packages (from pyxcp) (13.9.4)
Requirement already satisfied: bandit<2.0.0,>=1.7.8 in d:\program files\python310\lib\site-packages (from pyxcp) (1.8.0)
Requirement already satisfied: chardet<6.0.0,>=5.2.0 in d:\program files\python310\lib\site-packages (from pyxcp) (5.2.0)
Requirement already satisfied: traitlets<=5.11.2 in d:\program files\python310\lib\site-packages (from pyxcp) (5.11.2)
Requirement already satisfied: tomlkit<0.13.0,>=0.12.5 in d:\program files\python310\lib\site-packages (from pyxcp) (0.12.5)
Requirement already satisfied: pytz<2025.0,>=2024.1 in d:\program files\python310\lib\site-packages (from pyxcp) (2024.2)
Requirement already satisfied: colorama>=0.3.9 in d:\program files\python310\lib\site-packages (from bandit<2.0.0,>=1.7.8->pyxcp) (0.4.6)
Requirement already satisfied: PyYAML>=5.3.1 in d:\program files\python310\lib\site-packages (from bandit<2.0.0,>=1.7.8->pyxcp) (6.0.2)
Requirement already satisfied: line-profiler in d:\program files\python310\lib\site-packages (from line-profiler-pycharm<2.0.0,>=1.1.0->pyxcp) (4.2.0)
Requirement already satisfied: MarkupSafe>=0.9.2 in d:\program files\python310\lib\site-packages (from mako<2.0.0,>=1.2.4->pyxcp) (3.0.2)
Requirement already satisfied: packaging>=23.1 in d:\program files\python310\lib\site-packages (from python-can<5.0.0,>=4.2.2->pyxcp) (24.2)
Requirement already satisfied: wrapt~=1.10 in d:\program files\python310\lib\site-packages (from python-can<5.0.0,>=4.2.2->pyxcp) (1.17.0)
Requirement already satisfied: typing_extensions>=3.10.0.0 in d:\program files\python310\lib\site-packages (from python-can<5.0.0,>=4.2.2->pyxcp) (4.12.2)
Requirement already satisfied: markdown-it-py>=2.2.0 in d:\program files\python310\lib\site-packages (from rich<14.0.0,>=13.6.0->pyxcp) (3.0.0)
Requirement already satisfied: pygments<3.0.0,>=2.13.0 in d:\program files\python310\lib\site-packages (from rich<14.0.0,>=13.6.0->pyxcp) (2.18.0)
Requirement already satisfied: mdurl~=0.1 in d:\program files\python310\lib\site-packages (from markdown-it-py>=2.2.0->rich<14.0.0,>=13.6.0->pyxcp) (0.1.2)
Requirement already satisfied: pbr>=2.0.0 in d:\program files\python310\lib\site-packages (from stevedore>=1.20.0->bandit<2.0.0,>=1.7.8->pyxcp) (6.1.0)
Installing collected packages: pyxcp
Successfully installed pyxcp-0.22.13

[notice] A new release of pip is available: 23.0.1 -> 24.3.1
[notice] To update, run: D:\Program Files\Python310\python.exe -m pip install --upgrade pip
PS F:\New_pyxcp\pyxcp-master> xcp-profile convert -c your_config_file.toml -o pyxcp_conf.py
Traceback (most recent call last):
File "D:\Program Files\Python310\lib\runpy.py", line 196, in run_module_as_main
return run_code(code, main_globals, None,
File "D:\Program Files\Python310\lib\runpy.py", line 86, in run_code
exec(code, run_globals)
File "D:\Program Files\Python310\Scripts\xcp-profile.exe_main.py", line 4, in
File "D:\Program Files\Python310\lib\site-packages\pyxcp_init.py", line 11, in
from .master import Master # noqa: F401, E402
File "D:\Program Files\Python310\lib\site-packages\pyxcp\master_init.py", line 9, in
from .master import Master # noqa: F401
File "D:\Program Files\Python310\lib\site-packages\pyxcp\master\master.py", line 26, in
from pyxcp.daq_stim.stim import DaqEventInfo, Stim
File "D:\Program Files\Python310\lib\site-packages\pyxcp\daq_stim_init_.py", line 9, in
from pyxcp.cpp_ext import DaqList
File "D:\Program Files\Python310\lib\site-packages\pyxcp\cpp_ext_init_.py", line 1, in
from .cpp_ext import ( # noqa: F401
ImportError: DLL load failed while importing cpp_ext: 找不到指定的模块。

I uninstalled and installed again, but still got the same error

[christoph2]

OK, the binary distro (wheel) is used.
D:\Program Files\Python310\lib\site-packages\pyxcp\pyxcp\cpp_ext\ should contain a .pyd file, something like
cpp_ext.cp310-win_amd64.pyd, if not, something went wrong while building the wheel, but in this case it would not be available on PyPI -- strange.
In any case, you should try the local build pip install -e .

PS.: your_config_file.toml is just a placeholder...

[wokequnimei]

There is cpp_ext.cp310-win_amd64.pyd in D:\Program Files\Python310\Lib\site-packages\pyxcp\cpp_ext

[christoph2]

OK, maybe Python 3.10 has a problem with relative imports, I'll try to fix it.

[christoph2]

OK, v0.22.14 is now available, I hope it fixes the issue.

[wokequnimei]

PS F:\New_pyxcp\pyxcp-master\pyxcp\examples> xcp-profile convert -c your_config_file.toml -o pyxcp_conf.py
Traceback (most recent call last):
File "D:\Program Files\Python310\lib\runpy.py", line 196, in run_module_as_main
return run_code(code, main_globals, None,
File "D:\Program Files\Python310\lib\runpy.py", line 86, in run_code
exec(code, run_globals)
File "D:\Program Files\Python310\Scripts\xcp-profile.exe_main.py", line 4, in
File "D:\Program Files\Python310\lib\site-packages\pyxcp_init.py", line 11, in
from .master import Master # noqa: F401, E402
File "D:\Program Files\Python310\lib\site-packages\pyxcp\master_init.py", line 9, in
from .master import Master # noqa: F401
File "D:\Program Files\Python310\lib\site-packages\pyxcp\master\master.py", line 26, in
from pyxcp.daq_stim.stim import DaqEventInfo, Stim
File "D:\Program Files\Python310\lib\site-packages\pyxcp\daq_stim_init_.py", line 9, in
from pyxcp.cpp_ext.cpp_ext import DaqList
ImportError: DLL load failed while importing cpp_ext: 找不到指定的模块。
I have updated to v0.22.15, but still report the problem

OK, v0.22.14 is now available, I hope it fixes the issue.

[christoph2]

Well, I think your Python installation is fooled up.
Why are you using these strange runpy.py stuff and not the offical python.exe or the py launcher?