# Visual Studio 2019 Debug the problem

**URL:** https://discourse.vtk.org/t/visual-studio-2019-debug-the-problem/5566
**Category:** Support
**Created:** [April 18, 2021, 8:58am UTC](https://discourse.vtk.org/t/visual-studio-2019-debug-the-problem/5566 "2021-04-18T08:58:31Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![Jame](https://discourse.vtk.org/letter_avatar_proxy/v4/letter/j/73ab20/32.png) [@Jame](https://discourse.vtk.org/u/Jame)
#### Post date: [April 18, 2021, 8:58am UTC](https://discourse.vtk.org/t/visual-studio-2019-debug-the-problem/5566/1 "2021-04-18T08:58:31Z")

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Pop-up window:cannot start program“D:\VTK\bin\x64\Debug\ALL-BUILD”.Access denied.

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### Author: ![mwestphal](https://discourse.vtk.org/user_avatar/discourse.vtk.org/mwestphal/32/19_2.png) [@mwestphal](https://discourse.vtk.org/u/mwestphal)
#### Post date: [April 19, 2021, 8:13am UTC](https://discourse.vtk.org/t/visual-studio-2019-debug-the-problem/5566/2 "2021-04-19T08:13:17Z")

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Not a VTK question.

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### Author: ![amaclean](https://discourse.vtk.org/user_avatar/discourse.vtk.org/amaclean/32/224_2.png) [@amaclean](https://discourse.vtk.org/u/amaclean)
#### Post date: [April 19, 2021, 10:35pm UTC](https://discourse.vtk.org/t/visual-studio-2019-debug-the-problem/5566/3 "2021-04-19T22:35:00Z")

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This link may help you understand the role of `ALL_BUILD`: [[What are ALL\_BUILD and ZERO\_CHECK and do I need them?](https://stackoverflow.com/questions/27175754/what-are-all-build-and-zero-check-and-do-i-need-them)

You need to set your actual project as the start up project.