# Panic assert\_failed

**URL:** <https://community.particle.io/t/panic-assert-failed/46439>\
**Category:** Troubleshooting\
**Tags:** argon\
**Created:** [December 19, 2018, 10:46pm UTC](https://community.particle.io/t/panic-assert-failed/46439 "2018-12-19T22:46:45Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![will](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/will/32/23374_2.png) [@will](https://community.particle.io/u/will)\
**Post date:** [December 20, 2018, 11:41pm UTC](https://community.particle.io/t/panic-assert-failed/46439/4 "2018-12-20T23:41:20Z")

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Hello folks,

Wanted to follow-up with this thread to let everyone know that a fix for the SOS-7 issue has been released with `v0.8.0-rc.27`. The issues was tracked to a problem with the Nordic 802.15.4 driver. Instructions for upgrading are available below. We'd love to know if applying the release fixes the issue SOS-7 issue that you're experiencing.

> [@\[Updated 3/21/19\] Gen 3 known issues](https://community.particle.io/t/updated-12-20-particle-mesh-known-issues-and-fixes/45722/3):
>
> Updating to the most recent release (v0.9.0) The most recent release for Particle Mesh is v0.9.0. To update your device to this version of firmware, use the following instructions: If you previously tried to set up your device using the Android mobile app and got a Bluetooth (BLE) pairing error (Nexus 6) or an error during device firmware upgrade, you should first manually update the device firmware to 0.9.0 using the Using the Particle CLI instructions below. The BLE fix requires a Particle De…

* * *

**Note** that we have seen some reports of change in behavior for `rc.27` when users call the `Mesh.subscribe()` function within the `setup()` loop that can result in a separate SOS-10 code which we're currently investigating. If this issue affects you, please note the following workaround.

> [@\[Workaround identified\] Xenon flashing red 10 times after rc.27 upgrade](https://community.particle.io/t/workaround-identified-xenon-flashing-red-10-times-after-rc-27-upgrade/46455/12):
>
> Hey this is James from Particle. Please try adding waitUntil(Mesh.ready); before Mesh.subscribe() calls in setup() and see if that gets rid of the SOS. We’re looking into these issues.

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