# KNOWN ISSUE: Assertion failed! / Microsoft Visual C++ Runtime Library

**URL:** <https://forums.fatsharkgames.com/t/known-issue-assertion-failed-microsoft-visual-c-runtime-library/93637>\
**Category:** Technical Support\
**Tags:** devpost\
**Created:** [April 19, 2024, 5:04pm UTC](https://forums.fatsharkgames.com/t/known-issue-assertion-failed-microsoft-visual-c-runtime-library/93637 "2024-04-19T17:04:17Z")\
**Posts on this page:** 1\
**Showing post:** 34

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**Author:** ![FatsharkJulia](https://dub1.discourse-cdn.com/flex013/user_avatar/forums.fatsharkgames.com/fatsharkjulia/32/11653_2.png) [@FatsharkJulia](https://forums.fatsharkgames.com/u/FatsharkJulia)\
**Post date:** [May 22, 2024, 8:59am UTC](https://forums.fatsharkgames.com/t/known-issue-assertion-failed-microsoft-visual-c-runtime-library/93637/34 "2024-05-22T08:59:23Z")

</div>

We are now encouraging anybody playing on the `experimental` build that _does not_ have performance issues, to revert to the live build.

If you _are_ experiencing performance issues, please continue to use the `experimental` build as this contains important information on the stalls you’re experiencing.

The options to change direct storage are now supported in the live build, meaning you can make the changes below without using the `experimental` build.

It’s possible these changes will remain in place, so it’s possible no other action will be needed once you have switched builds.

For your information, we are looking at including these options within Darktide’s launcher, to make the process easier.

* * *

## Part 1: Setting Feature Flags

1. Navigate to your Darktide AppData by:

- Press the Windows key + R
- Enter `%appdata%` within the search input and select ‘OK’
- Navigate to `AppData\Roaming\Fatshark\Darktide`

1. Open the `user_settings.config`
2. At the VERY TOP of the `user_settings.config`, enter the lines below:

```auto
direct_storage = {
    enabled = true
    disable_bypass_io = true
    force_file_buffering = true
    force_mapping_layer = false
}

```

1. Save your changes
2. Play!
3. Post here to let us know the outcome

**NOTE** : If you currently have `disable_dstorage = true` in your `user_settings.config` from previous instructions, please remove it and replace with the updated version above.

## Part 2: Didn’t Work?

In the event the instructions above did not help with your issue, please try:

1. Navigate to your Darktide AppData by:

- Press the Windows key + R
- Enter `%appdata%` within the search input and select ‘OK’
- Navigate to `AppData\Roaming\Fatshark\Darktide`

1. Open the `user_settings.config`
2. Remove the changes made previously
3. At the VERY TOP of the `user_settings.config`, enter the line below:

```auto
direct_storage = {
    enabled = false
}

```

1. Save your changes
2. Play!
3. Post here to let us know the outcome

**NOTE** : If you currently have `disable_dstorage = true` in your `user_settings.config` from previous instructions, please remove it and replace with the updated version above.

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_[View the full topic](https://forums.fatsharkgames.com/t/known-issue-assertion-failed-microsoft-visual-c-runtime-library/93637)._