# QA40x crashing (on a Mac running Windows 10)

**URL:** <https://forum.quantasylum.com/t/qa40x-crashing-on-a-mac-running-windows-10/1443>\
**Category:** Uncategorized\
**Created:** [June 17, 2024, 3:19pm UTC](https://forum.quantasylum.com/t/qa40x-crashing-on-a-mac-running-windows-10/1443 "2024-06-17T15:19:29Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![squasher](https://avatars.discourse-cdn.com/v4/letter/s/4af34b/32.png) [@squasher](https://forum.quantasylum.com/u/squasher)\
**Post date:** [June 17, 2024, 3:19pm UTC](https://forum.quantasylum.com/t/qa40x-crashing-on-a-mac-running-windows-10/1443/1 "2024-06-17T15:19:29Z")

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I have a Mac laptop (the last version with an Intel processor allowing me to run Windows 10 natively using BootCamp).

QA40x used to work fine a long while ago (allowing me to run with and without my QA403 connected). Unfortunately, I updated to the latest version of QA40x and now it crashes after a warning Window pops up). This happens in stand-alone mode.

1. Is there a known working release of QA40x that I can revert to?
2. How can I go about debugging the crash?

I will fill in more details in a subsequent post if necessary…

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**Author:** ![matt](https://avatars.discourse-cdn.com/v4/letter/m/a6a055/32.png) [@matt](https://forum.quantasylum.com/u/matt)\
**Post date:** [June 17, 2024, 6:07pm UTC](https://forum.quantasylum.com/t/qa40x-crashing-on-a-mac-running-windows-10/1443/2 "2024-06-17T18:07:53Z")

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Hi @Squasher, what does the warning window say?

You might try delete your default settings file. Go to the `C:\Users\USERNAME\Documents\QuantAsylum\QA40x` folder and delete (or rename) the `default.settings` file. A new one will created next time you start the application.

If it still happens after that, you can launch the app with `-L` to enable logging, and/or `-C` to enable console output. One of those might give a clue what is preventing the app from running.

Thanks, Matt

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**Author:** ![squasher](https://avatars.discourse-cdn.com/v4/letter/s/4af34b/32.png) [@squasher](https://forum.quantasylum.com/u/squasher)\
**Post date:** [June 17, 2024, 7:37pm UTC](https://forum.quantasylum.com/t/qa40x-crashing-on-a-mac-running-windows-10/1443/3 "2024-06-17T19:37:34Z")

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Renaming the default.settings file and restarting the app solved the problem!

Thanks for the help!

Chris

As an aside, I’m attaching the Error message window that pops up…  
 ![Screenshot 2024-06-17 at 3.19.19 PM](https://canada1.discourse-cdn.com/flex032/uploads/quantasylum/original/2X/4/477148a3cb5cda8567ac9a354b6486cec09ffbf5.png)

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**Author:** ![matt](https://avatars.discourse-cdn.com/v4/letter/m/a6a055/32.png) [@matt](https://forum.quantasylum.com/u/matt)\
**Post date:** [June 17, 2024, 11:14pm UTC](https://forum.quantasylum.com/t/qa40x-crashing-on-a-mac-running-windows-10/1443/4 "2024-06-17T23:14:19Z")

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Got it, thanks! that message should be more clear.