# \#cuda
**URL:** https://discourse.itk.org/tag/cuda/229.md
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## [Build Error: LNK1169 when building ITK with RTK Python wrappers on Windows](https://discourse.itk.org/t/build-error-lnk1169-when-building-itk-with-rtk-python-wrappers-on-windows/7635)
**Author:** [@gaoweilin](https://discourse.itk.org/u/gaoweilin)\
**Replies:** 9\
**Last updated:** [September 21, 2025, 8:04pm UTC](https://discourse.itk.org/t/build-error-lnk1169-when-building-itk-with-rtk-python-wrappers-on-windows/7635 "2025-09-21T20:04:03Z")
I am encountering a linker error (LNK1169) while trying to build the ITK Python wrappers for the Reconstruction Toolkit (RTK). The build fails to generate the itk\_RTKPython.pyd file. I have tried several common troublesh…
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## [Not able to get RTK speedups on GPU](https://discourse.itk.org/t/not-able-to-get-rtk-speedups-on-gpu/7507)
**Author:** [@whitaker](https://discourse.itk.org/u/whitaker)\
**Replies:** 11\
**Last updated:** [July 28, 2025, 9:24pm UTC](https://discourse.itk.org/t/not-able-to-get-rtk-speedups-on-gpu/7507 "2025-07-28T21:24:47Z")
Hi. I am using RTK to do iterative reconstruction. Everything seems to be working, except when trying to run things on the GPU. Everything compiles fine and it runs. However, when the GPU-compiled programs run, they …
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## [NVCC compilation error for ITK 5.3](https://discourse.itk.org/t/nvcc-compilation-error-for-itk-5-3/5612)
**Author:** [@mzukovec](https://discourse.itk.org/u/mzukovec)\
**Replies:** 5\
**Last updated:** [May 27, 2023, 1:55am UTC](https://discourse.itk.org/t/nvcc-compilation-error-for-itk-5-3/5612 "2023-05-27T01:55:46Z")
Hello. When I try to use image reading functionality inside .cu file, I get compilation errors, whereas if I put the same code inside .cpp file, which is compiler using regular host compiler, the code normally compiles. …