# App recording freezes and then crashes

**URL:** <https://forum.qoitech.com/t/app-recording-freezes-and-then-crashes/341>\
**Category:** Support\
**Created:** [July 28, 2020, 7:39am UTC](https://forum.qoitech.com/t/app-recording-freezes-and-then-crashes/341 "2020-07-28T07:39:23Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![jpmeijers](https://avatars.discourse-cdn.com/v4/letter/j/db5fbb/32.png) [@jpmeijers](https://forum.qoitech.com/u/jpmeijers)\
**Post date:** [July 28, 2020, 7:39am UTC](https://forum.qoitech.com/t/app-recording-freezes-and-then-crashes/341/1 "2020-07-28T07:39:23Z")

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Using Ubuntu Linux 20.04  
Latest Otii app and firmware

I follow these steps to reproduce:

- Open the app and choose to only record the main current.
- Start a recording and then enable power.
- Use Alt+mouse scroll to zoom in on the y axis
- The current spikes up to about 30% of the y axis height on the graph and then the recording stops
- When I try to stop recording and delete the trace the app crashes

I launched the otii app in a terminal, but it forked so there is no error output displayed.

 ![Screenshot from 2020-07-28 09-21-41](https://europe1.discourse-cdn.com/flex017/uploads/qoitech/original/1X/d41b9491ac6ac7737027371041719e4192f4cd08.jpeg)

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**Author:** ![jpmeijers](https://avatars.discourse-cdn.com/v4/letter/j/db5fbb/32.png) [@jpmeijers](https://forum.qoitech.com/u/jpmeijers)\
**Post date:** [July 28, 2020, 7:43am UTC](https://forum.qoitech.com/t/app-recording-freezes-and-then-crashes/341/2 "2020-07-28T07:43:19Z")

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The only way I was able to get it to work again was to power cycle the Otii Arc. It has been plugged in for \>12 hours when this reproducible crash of the app happened. After power cycling the app does not crash and recording works fine again.

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<div class="post-metadata">

**Author:** ![jpmeijers](https://avatars.discourse-cdn.com/v4/letter/j/db5fbb/32.png) [@jpmeijers](https://forum.qoitech.com/u/jpmeijers)\
**Post date:** [July 28, 2020, 7:55am UTC](https://forum.qoitech.com/t/app-recording-freezes-and-then-crashes/341/3 "2020-07-28T07:55:20Z")

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Actually I spoke too soon. About 10 minutes into the recording I wanted to stop recording and power cycle the DUT. Starting a new recording only lasted a second and then stopped. Trying to stop the recording and delete it caused the app to crash again.

How can I debug this? Currently the Otii is unusable to me.

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**Author:** ![bjorn.rosqvist](https://dub1.discourse-cdn.com/flex017/user_avatar/forum.qoitech.com/bjorn.rosqvist/32/238_2.png) [@bjorn.rosqvist](https://forum.qoitech.com/u/bjorn.rosqvist)\
**Post date:** [July 29, 2020, 6:13am UTC](https://forum.qoitech.com/t/app-recording-freezes-and-then-crashes/341/4 "2020-07-29T06:13:28Z")

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Hi,

I have seen crashes like this before, and then it has been related to things like network connected drives.  
Try to change the working directory for Otii by going to File -\> Preferences and change Open project folder.  
If this doesn’t work, I suggest that you create a case in our case system and we will dig deeper into what the problem is.

Best regards,  
Björn