# Crash on network failure

**URL:** <https://devforum.zoom.us/t/crash-on-network-failure/98642>\
**Category:** macOS\
**Created:** [November 19, 2023, 5:15am UTC](https://devforum.zoom.us/t/crash-on-network-failure/98642 "2023-11-19T05:15:52Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![rokgregoric](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/rokgregoric/32/40678_2.png) [@rokgregoric](https://devforum.zoom.us/u/rokgregoric)\
**Post date:** [November 19, 2023, 5:15am UTC](https://devforum.zoom.us/t/crash-on-network-failure/98642/1 "2023-11-19T05:15:52Z")

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**Description**  
A crash happens ON EVERY SINGLE network failure/loss when `sessionContext.externalVideoSource` is set.

**Which macOS Video SDK version?**  
v1.9.6 and older (all from v1.3.2 onwards)

**Steps to reproduce the behavior**

1. sessionContext.externalVideoSource = videoEngine;
2. connect to session
3. disconnect wifi

**Sample project**  
I’ve modified the sample project bundled with the SDK to replicate this problem:  
[https://www.dropbox.com/scl/fi/mjoc5a3gx3p52x19ix40o/ZoomVideoSDKSample.zip?rlkey=caxxkvmy4isqd8w667fc59l8c&dl=1](https://www.dropbox.com/scl/fi/mjoc5a3gx3p52x19ix40o/ZoomVideoSDKSample.zip?rlkey=caxxkvmy4isqd8w667fc59l8c&dl=1)

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<div class="post-metadata">

**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:** [January 3, 2024, 7:59pm UTC](https://devforum.zoom.us/t/crash-on-network-failure/98642/3 "2024-01-03T19:59:09Z")

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