# The program '\[12808\] SlicerApp-real.exe' has exited with code -1073741515 (0xc0000135) 'A dependent dll was not found'.

**URL:** <https://discourse.slicer.org/t/the-program-12808-slicerapp-real-exe-has-exited-with-code-1073741515-0xc0000135-a-dependent-dll-was-not-found/2537>\
**Category:** Support\
**Created:** [April 9, 2018, 6:53am UTC](https://discourse.slicer.org/t/the-program-12808-slicerapp-real-exe-has-exited-with-code-1073741515-0xc0000135-a-dependent-dll-was-not-found/2537 "2018-04-09T06:53:08Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![1115](https://avatars.discourse-cdn.com/v4/letter/1/9f8e36/32.png) [@1115](https://discourse.slicer.org/u/1115)\
**Post date:** [April 9, 2018, 6:53am UTC](https://discourse.slicer.org/t/the-program-12808-slicerapp-real-exe-has-exited-with-code-1073741515-0xc0000135-a-dependent-dll-was-not-found/2537/1 "2018-04-09T06:53:08Z")

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Operating system:Windows 10  
Slicer version:4.9  
Expected behavior:debug  
Actual behavior:

I compiled and run Slicer, but after restarting the computer, I get the following error:  
System lost CTKWidgets.dll ,QtCored4.dll, QtGuid4.dll…

 ![%E5%BE%AE%E4%BF%A1%E5%9B%BE%E7%89%87_20180409144816](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/e/6/e6412708dd05993250a49e172c53d7b4c663f5f4.png)

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**Author:** ![timeanddoctor](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/timeanddoctor/32/5839_2.png) [@timeanddoctor](https://discourse.slicer.org/u/timeanddoctor)\
**Post date:** [April 11, 2018, 1:34pm UTC](https://discourse.slicer.org/t/the-program-12808-slicerapp-real-exe-has-exited-with-code-1073741515-0xc0000135-a-dependent-dll-was-not-found/2537/2 "2018-04-11T13:34:25Z")

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The anti-virus software killed and deleted essensial files. I think you can donwload the latest version of 3d slicer and then re-install after closing this safe-manager such as 360/qq in Chinese.

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**Author:** ![ihnorton](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/ihnorton/32/9_2.png) [@ihnorton](https://discourse.slicer.org/u/ihnorton)\
**Post date:** [April 11, 2018, 2:53pm UTC](https://discourse.slicer.org/t/the-program-12808-slicerapp-real-exe-has-exited-with-code-1073741515-0xc0000135-a-dependent-dll-was-not-found/2537/3 "2018-04-11T14:53:37Z")

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In order to launch Slicer in Visual Studio, the environment (PATH) needs to be set up correctly. Please see:

[https://www.slicer.org/wiki/Documentation/Nightly/Developers/Tutorials/Debug\_Instructions#Using\_Visual\_Studio](https://www.slicer.org/wiki/Documentation/Nightly/Developers/Tutorials/Debug_Instructions#Using_Visual_Studio)