\> \> const & \_\_cdecl rtk::ProjectionGeometry\<3\>::GetMatrices(void)const " (?GetMatrices@?$ProjectionGeometry@$02@rtk@@QEBAAEBV?$vector@V?$Matrix@N$02$03@itk@@V?$allocator@V?$Matrix@N$02$03@itk@@@std@@@std@@XZ) 已经在 rtkProjectionGeometryPython.obj 中定义 RTKPython C:\Reconstraction\ITK\Build\Wrapping\Modules\RTK\itkRTK-5.4.lib(itkRTK-5.4.dll) 1 我想在帖子中询问这个错误
---
### Author:  [@simon.rit](https://discourse.itk.org/u/simon.rit)
#### Post date: [September 20, 2025, 11:49am UTC](https://discourse.itk.org/t/build-error-lnk1169-when-building-itk-with-rtk-python-wrappers-on-windows/7635/4 "2025-09-20T11:49:48Z")
Please describe how one can reproduce this “new error”.
---
### Author:  [@gaoweilin](https://discourse.itk.org/u/gaoweilin)
#### Post date: [September 20, 2025, 12:50pm UTC](https://discourse.itk.org/t/build-error-lnk1169-when-building-itk-with-rtk-python-wrappers-on-windows/7635/5 "2025-09-20T12:50:45Z")
1. Used CMake-GUI to configure and generate the ITK solution. I enabled the `ITK_WRAP_PYTHON` option.
2. Set `CMAKE_INSTALL_PREFIX` to `C:\Reconstraction\ITK\Bin`.
Enabled the following CMake options: `BUILD_SHARED_LIBS`, `ITKReview`, `ITK_USE_FFTWD`, `ITK_USE_FFTWF`, `ITK_USE_SYSTEM_FFTWD`, `ITK_USE_SYSTEM_FFTWF` (and specified the paths to my FFTW installation). I also enabled `Module_cudacommon`.
Then, I used VS2022 to build the `ALL_BUILD` target in Release mode, and the following error occurs，These errors occur simultaneously：
```auto
Creating library C:/Reconstraction/ITK/Build/lib/Release/RTKPython.lib and object C:/Reconstraction/ITK/Build/lib/Release/RTKPython.exp
C:\Reconstraction\ITK\Build\Wrapping\Generators\Python\itk\_RTKPython.pyd : fatal error LNK1169: one or more multiply defined symbols found
Build of project “RTKPython.vcxproj” completed – FAILED.
```
---
### Author:  [@gaoweilin](https://discourse.itk.org/u/gaoweilin)
#### Post date: [September 20, 2025, 2:32pm UTC](https://discourse.itk.org/t/build-error-lnk1169-when-building-itk-with-rtk-python-wrappers-on-windows/7635/6 "2025-09-20T14:32:05Z")
I want to use the Python version of RTK with CUDA acceleration. I downloaded it using `python -m pip install itk-rtk-cuda124`, but my tests kept throwing errors, so I tried compiling ITK and RTK instead…
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### Author:  [@simon.rit](https://discourse.itk.org/u/simon.rit)
#### Post date: [September 20, 2025, 2:39pm UTC](https://discourse.itk.org/t/build-error-lnk1169-when-building-itk-with-rtk-python-wrappers-on-windows/7635/7 "2025-09-20T14:39:32Z")
What are the errors? It’s the same code so I doubt that there will be any difference.
---
### Author:  [@gaoweilin](https://discourse.itk.org/u/gaoweilin)
#### Post date: [September 20, 2025, 3:03pm UTC](https://discourse.itk.org/t/build-error-lnk1169-when-building-itk-with-rtk-python-wrappers-on-windows/7635/8 "2025-09-20T15:03:15Z")
(PyCharmMiscProject) PS C:\Users\lianglab\PyCharmMiscProject\> python FirstReconstruction.py output.mha geometry.xml
Traceback (most recent call last):
File “C:\Users\lianglab\PyCharmMiscProject\FirstReconstruction.py”, line 11, in
ImageType = itk.Image[itk.F, 3]
^^^^^^^^^
File “C:\Reconstraction\ITK\Build\Wrapping\Generators\Python\itk\support\lazy.py”, line 138, in **getattribute**
base.itk\_load\_swig\_module(module, namespace)
File “C:\Reconstraction\ITK\Build\Wrapping\Generators\Python\itk\support\base.py”, line 94, in itk\_load\_swig\_module
itk\_load\_swig\_module(dep, namespace)
File “C:\Reconstraction\ITK\Build\Wrapping\Generators\Python\itk\support\base.py”, line 130, in itk\_load\_swig\_module
l\_module = loader.load(swig\_module\_name)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File “C:\Reconstraction\ITK\Build\Wrapping\Generators\Python\itk\support\base.py”, line 289, in load
l\_spec.loader.exec\_module(l\_module) # pytype: disable=attribute-error
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File “”, line 940, in exec\_module
File “”, line 241, in \_call\_with\_frames\_removed
File “C:\Reconstraction\ITK\Build\Wrapping\Generators\Python\itk\support..\ITKPyBasePython.py”, line 63, in
from itk.pyBasePython import \*
File “C:\Reconstraction\ITK\Build\Wrapping\Generators\Python\itk\pyBasePython.py”, line 15, in
from . import \_ITKCommonPython
ImportError: cannot import name '_ITKCommonPython’ from ‘itk’ (C:\Reconstraction\ITK\Build\Wrapping\Generators\Python\itk\_init_.py)
---
### Author:  [@gaoweilin](https://discourse.itk.org/u/gaoweilin)
#### Post date: [September 20, 2025, 3:04pm UTC](https://discourse.itk.org/t/build-error-lnk1169-when-building-itk-with-rtk-python-wrappers-on-windows/7635/9 "2025-09-20T15:04:34Z")
This is the result of running the First Reconstruction example from RTK.
---
### Author:  [@simon.rit](https://discourse.itk.org/u/simon.rit)
#### Post date: [September 21, 2025, 8:04pm UTC](https://discourse.itk.org/t/build-error-lnk1169-when-building-itk-with-rtk-python-wrappers-on-windows/7635/10 "2025-09-21T20:04:03Z")
It seems to have trouble loading the package which might be due to missing libraries. Since you’re using the Cuda package, can you try adding the two lines in [CudaFirstReconstruction.py](https://github.com/RTKConsortium/RTK/blob/main/examples/FirstReconstruction/FirstCudaReconstruction.py) before line 11?
```auto
if sys.platform == "win32":
os.add_dll_directory(os.path.join(os.environ["CUDA_PATH"], "bin"))
```
Have you tried the Cuda example?