# VTK 9.6.2 Windows wheel: Code Integrity blocks vtkCommonExecutionModel DLL

**URL:** https://discourse.vtk.org/t/vtk-9-6-2-windows-wheel-code-integrity-blocks-vtkcommonexecutionmodel-dll/16559
**Category:** Support
**Created:** [October 12, 2026, 5:50pm UTC](https://discourse.vtk.org/t/vtk-9-6-2-windows-wheel-code-integrity-blocks-vtkcommonexecutionmodel-dll/16559 "2026-10-12T17:50:33Z")
**Posts on this page:** 1
**Page:** 1

<div class="post-metadata">

### Author: ![jitendra.pandre](https://discourse.vtk.org/letter_avatar_proxy/v4/letter/j/eb9ed0/32.png) [@jitendra.pandre](https://discourse.vtk.org/u/jitendra.pandre)
#### Post date: [October 12, 2026, 5:50pm UTC](https://discourse.vtk.org/t/vtk-9-6-2-windows-wheel-code-integrity-blocks-vtkcommonexecutionmodel-dll/16559/1 "2026-10-12T17:50:33Z")

</div>

Hello VTK community,

We are investigating a Windows native-library loading failure involving:

`vtk-9.6.2-cp312-cp312-win_amd64.whl`

Environment:

- Windows 11, 64-bit

- CPython 3.12.10

- VTK 9.6.2

- CadQuery 2.8.0 and cadquery-ocp 7.9.3.1.1

During our CadQuery-based application pipeline, Windows Code Integrity events 3077 and 3033 identify this blocked file:

`vtk.libs/vtkCommonExecutionModel-9.6.2.dll`

The events report policy/signing-level rejection. Policy-state evidence indicates Smart App Control involvement.

Read-only inspection found:

- Installed DLL and corresponding wheel member are byte-identical.

- Size: 1,875,456 bytes.

- SHA256: `C72781DE2EFBEA203950A72EE571998EAD6F7710AE796CC8EEFA20BAB881F1C7`

- Authenticode status: `NotSigned`.

- No Zone.Identifier stream.

Is this a known compatibility issue for the Windows wheel? Is there a supported signed distribution or recommended deployment route that retains Windows application-control enforcement?

The failure was observed through a CadQuery application, not yet reproduced through an independent VTK-only example. We are therefore asking for compatibility guidance rather than claiming a VTK functional defect.

We can provide sanitized diagnostic excerpts. No security-policy changes or binary modifications have been made. Please advise whether this belongs in the VTK GitLab tracker.