# Zoom Custom UI Demo Crash

**URL:** <https://devforum.zoom.us/t/zoom-custom-ui-demo-crash/59031>\
**Category:** Windows\
**Created:** [October 18, 2021, 2:27pm UTC](https://devforum.zoom.us/t/zoom-custom-ui-demo-crash/59031 "2021-10-18T14:27:27Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![Wolf\_Isaac](https://avatars.discourse-cdn.com/v4/letter/w/dec6dc/32.png) [@Wolf\_Isaac](https://devforum.zoom.us/u/Wolf_Isaac)\
**Post date:** [October 18, 2021, 2:27pm UTC](https://devforum.zoom.us/t/zoom-custom-ui-demo-crash/59031/1 "2021-10-18T14:27:27Z")

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**Description**  
I can crash the base custom demo ui without modification consistently.

**Which Windows Meeting SDK version?**  
v5.7.6.1072

**To Reproduce(If applicable)**  
Steps to reproduce the behavior:

1. Download and launch demo
2. init as custom UI
3. join a meeting
4. Show gallery view video
5. Have 2 people in the page you are viewing with video on leave at the same time
6. If crash does not occur on the first time, retry a few times and zoom should crash.

**Device (please complete the following information):**

- Device: [Custom Gaming PC]
- OS: Win 10

**Additional context**  
Error typically occurs in The custom video mgr under the function resubscribe normal user, however heap corruption occurs before this function is called.

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**Author:** ![Michael\_Condon](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/michael_condon/32/13543_2.png) [@Michael\_Condon](https://devforum.zoom.us/u/Michael_Condon)\
**Post date:** [October 20, 2021, 10:35pm UTC](https://devforum.zoom.us/t/zoom-custom-ui-demo-crash/59031/2 "2021-10-20T22:35:51Z")

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Hey @Wolf_Isaac,

Thanks for using the dev forum!

I was able to reproduce this issue and we have fixed it in the latest version of the SDK demo application. Can you update and let me know if you are seeing the same issue?

Thanks!  
Michael

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**Author:** ![tailinchu](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/tailinchu/32/12579_2.png) [@tailinchu](https://devforum.zoom.us/u/tailinchu)\
**Post date:** [November 5, 2021, 8:54pm UTC](https://devforum.zoom.us/t/zoom-custom-ui-demo-crash/59031/3 "2021-11-05T20:54:59Z")

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@Michael_Condon do you know what version of sdk has this fix? thanks!

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**Author:** ![tailinchu](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/tailinchu/32/12579_2.png) [@tailinchu](https://devforum.zoom.us/u/tailinchu)\
**Post date:** [November 9, 2021, 6:20pm UTC](https://devforum.zoom.us/t/zoom-custom-ui-demo-crash/59031/4 "2021-11-09T18:20:40Z")

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@Michael_Condon ping thx

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**Author:** ![Michael\_Condon](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/michael_condon/32/13543_2.png) [@Michael\_Condon](https://devforum.zoom.us/u/Michael_Condon)\
**Post date:** [November 11, 2021, 11:56pm UTC](https://devforum.zoom.us/t/zoom-custom-ui-demo-crash/59031/5 "2021-11-11T23:56:32Z")

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Hey @tailinchu,

It appears this issue remains. The engineers are still investigating.

Thanks!  
Michael

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**Author:** ![system](https://us1.discourse-cdn.com/flex016/uploads/zoomdeveloper/original/3X/6/1/614bdd549b610bbaa46ff934617683a02bdaa03c.png) [@system](https://devforum.zoom.us/u/system)\
**Post date:** [December 12, 2021, 9:56am UTC](https://devforum.zoom.us/t/zoom-custom-ui-demo-crash/59031/6 "2021-12-12T09:56:55Z")

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Closed on December 12, 2021, 9:56am UTC

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