# Cannot open 3D slicer because of missing vtkcommon-8.2.dll files

**URL:** <https://discourse.slicer.org/t/cannot-open-3d-slicer-because-of-missing-vtkcommon-8-2-dll-files/7046>\
**Category:** Support\
**Created:** [June 6, 2019, 2:40am UTC](https://discourse.slicer.org/t/cannot-open-3d-slicer-because-of-missing-vtkcommon-8-2-dll-files/7046 "2019-06-06T02:40:35Z")\
**Posts on this page:** 8\
**Page:** 1

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**Author:** ![TingtingYu](https://avatars.discourse-cdn.com/v4/letter/t/b38774/32.png) [@TingtingYu](https://discourse.slicer.org/u/TingtingYu)\
**Post date:** [June 6, 2019, 2:40am UTC](https://discourse.slicer.org/t/cannot-open-3d-slicer-because-of-missing-vtkcommon-8-2-dll-files/7046/1 "2019-06-06T02:40:35Z")

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Hi~,

3D slicer cannot be opened suddenly and it gave a warning message which said cannot find the vtkcommon-8.2.dll file. I reinstalled 3D slicer and still got that message. Could you help me to fixed it?

Best,  
Tingting

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**Author:** ![cpinter](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/cpinter/32/7995_2.png) [@cpinter](https://discourse.slicer.org/u/cpinter)\
**Post date:** [June 6, 2019, 2:57am UTC](https://discourse.slicer.org/t/cannot-open-3d-slicer-because-of-missing-vtkcommon-8-2-dll-files/7046/2 "2019-06-06T02:57:44Z")

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If you used something other than 4.10.2, then please try the latest stable: [https://download.slicer.org/](https://download.slicer.org/)

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [June 6, 2019, 3:12am UTC](https://discourse.slicer.org/t/cannot-open-3d-slicer-because-of-missing-vtkcommon-8-2-dll-files/7046/3 "2019-06-06T03:12:19Z")

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Have you launched the application by running Slicer.exe?  
Does vtkCommon-8.2.dll exist?

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**Author:** ![TingtingYu](https://avatars.discourse-cdn.com/v4/letter/t/b38774/32.png) [@TingtingYu](https://discourse.slicer.org/u/TingtingYu)\
**Post date:** [June 7, 2019, 5:17am UTC](https://discourse.slicer.org/t/cannot-open-3d-slicer-because-of-missing-vtkcommon-8-2-dll-files/7046/4 "2019-06-07T05:17:05Z")

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Thanks for your reply. I try the latest stable one. It did not work.

Best,  
Tingting

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**Author:** ![TingtingYu](https://avatars.discourse-cdn.com/v4/letter/t/b38774/32.png) [@TingtingYu](https://discourse.slicer.org/u/TingtingYu)\
**Post date:** [June 7, 2019, 5:19am UTC](https://discourse.slicer.org/t/cannot-open-3d-slicer-because-of-missing-vtkcommon-8-2-dll-files/7046/5 "2019-06-07T05:19:18Z")

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Yes. But it showed the same warning. I check the bin folder. vtkCommon-8.2.dll does not exist.

Best,  
Tingting

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**Author:** ![TingtingYu](https://avatars.discourse-cdn.com/v4/letter/t/b38774/32.png) [@TingtingYu](https://discourse.slicer.org/u/TingtingYu)\
**Post date:** [June 7, 2019, 6:36am UTC](https://discourse.slicer.org/t/cannot-open-3d-slicer-because-of-missing-vtkcommon-8-2-dll-files/7046/6 "2019-06-07T06:36:53Z")

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It existed before I launched Slicer.exe

Best,  
Tingting

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [June 9, 2019, 6:43pm UTC](https://discourse.slicer.org/t/cannot-open-3d-slicer-because-of-missing-vtkcommon-8-2-dll-files/7046/7 "2019-06-09T18:43:46Z")

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Do you have any anti-virus product installed? Maybe the dll is mistaken for malware and quarantined.

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**Author:** ![TingtingYu](https://avatars.discourse-cdn.com/v4/letter/t/b38774/32.png) [@TingtingYu](https://discourse.slicer.org/u/TingtingYu)\
**Post date:** [June 10, 2019, 1:01pm UTC](https://discourse.slicer.org/t/cannot-open-3d-slicer-because-of-missing-vtkcommon-8-2-dll-files/7046/8 "2019-06-10T13:01:09Z")

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Yes. It works after I close the anti-virus product. Thank you.

Best,  
Tingting