# Build error: VTK 9.5.2, Debug/Win32, MSVC 14.44.35207 (Visual Studio 2022 17)
**URL:** https://discourse.vtk.org/t/build-error-vtk-9-5-2-debug-win32-msvc-14-44-35207-visual-studio-2022-17/16269
**Category:** Support
**Tags:** build
**Created:** [February 4, 2026, 9:58am UTC](https://discourse.vtk.org/t/build-error-vtk-9-5-2-debug-win32-msvc-14-44-35207-visual-studio-2022-17/16269 "2026-02-04T09:58:52Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@francek](https://discourse.vtk.org/u/francek)
#### Post date: [February 4, 2026, 9:58am UTC](https://discourse.vtk.org/t/build-error-vtk-9-5-2-debug-win32-msvc-14-44-35207-visual-studio-2022-17/16269/1 "2026-02-04T09:58:52Z")
Hi,
I tried to build VTK 9.5.2 for Win32/x86, but the build failed.
The same configuration builds VTK 9.4.1 successfully.
[260203\_build\_vtk9.5.2\_x86\_msvs\_output\_\_2 target failed\_1.txt](https://discourse.vtk.org/uploads/short-url/sp03m1a4GYWOcRF4BxByvhJxaR0.txt) (565.0 KB)
Cmake settings
```auto
CMAKE_AR
C:/Program Files/Microsoft Visual Studio/2022/Community/VC/Tools/MSVC/14.44.35207
CMAKE_CONFIGURATION_TYPES
Debug
```
Error
```auto
34>C:\Users\f\built\libs\vtk\260203_vtk_9.5.2\ThirdParty\libharu\vtklibharu\src\hpdf_pdfa.c(148,1): error C2373: 'vtklibharu_HPDF_PDFA_SetPDFAConformance': redefinition; different type modifiers
34> C:\Users\f\built\libs\vtk\260203_vtk_9.5.2\ThirdParty\libharu\vtklibharu\include\hpdf_pdfa.h(35,1):
34> see declaration of 'vtklibharu_HPDF_PDFA_SetPDFAConformance'
```
Also many warnings - I guess because targeting x86
`warning C4244: ‘initializing’: conversion from ‘int64_t’ to ‘size_t’, possible loss of data`
Any idea how to fix this ?
Thanks
---
### Author:  [@dgobbi](https://discourse.vtk.org/u/dgobbi)
#### Post date: [February 4, 2026, 1:50pm UTC](https://discourse.vtk.org/t/build-error-vtk-9-5-2-debug-win32-msvc-14-44-35207-visual-studio-2022-17/16269/2 "2026-02-04T13:50:41Z")
This issue with VTK 9.5.x is specific to 32-bit builds. It should be fixed in VTK 9.6.0. See gitlab issue [#19765](https://gitlab.kitware.com/vtk/vtk/-/issues/19765) for additional details.
---
### Author:  [@francek](https://discourse.vtk.org/u/francek)
#### Post date: [February 4, 2026, 2:05pm UTC](https://discourse.vtk.org/t/build-error-vtk-9-5-2-debug-win32-msvc-14-44-35207-visual-studio-2022-17/16269/3 "2026-02-04T14:05:58Z")
Thanks for the clarification and the link. I’m getting back to VTK after a few years, so I need a bit of time to figure out where to look for answers.
