> ## Documentation Index
> Fetch the complete documentation index at: https://dragonwingdocs.qualcomm.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Troubleshoot common issues

## Compile

### The fetch speed is slow when compiling `nativesdk-glibc`

**Resolution**:
Change the source settings as follows:

1. Open the recipe file:
   ```bash theme={null}
    vim <workspace>/layers/poky/meta/recipes-core/glibc/glibc_2.39.bb +35
   ```
2. Add the following line to the file:
   ```cpp theme={null}
    PREMIRRORS = ""
   ```
3. Save the and exit.
4. Clean and fetch `nativesdk-glibc` again:
   ```bash theme={null}
   bitbake -c cleanall nativesdk-glibc
   bitbake -c do_fetch nativesdk-glibc
   ```
5. After the commands finish, rebuild according to the original procedure.

### Kas reports `remote HEAD refers to nonexistent ref`

**Symptom**:
When you run a `kas shell` command, the build fails with the following error even though the layer repository is intact:

```bash theme={null}
ERROR    - warning: remote HEAD refers to nonexistent ref, unable to checkout
```

**Resolution**:
This error is caused by an outdated version of kas. Check your kas version and confirm that it is 4.8 or later:

```bash theme={null}
kas --version
```

If the version is earlier than 4.8, upgrade kas and run the command again.

### eSDK build fails after switching MACHINE in the same workspace

**Symptom**:
When you build the eSDK with a different MACHINE in a workspace that was previously used for another MACHINE, the build fails with an error similar to the following:

```bash theme={null}
ERROR: Task (<WORKSPACE>/build/tmp/work/iq_8275_evk-qcom-linux/qcom-robotics-proprietary-image/1.0/sdk-ext/im
age/tmp-renamed-sdk/layers/meta-qcom-robotics-sdk/recipes-products/packagegroups/packagegroup-robotics-opensource.bb:do_populate_lic) failed with
exit code 'setscene ignore_tasks'
NOTE: Tasks Summary: Attempted 12 tasks of which 6 didn't need to be rerun and 1 failed.
```

**Resolution**:
Clean the robotics package group sstate cache, then rebuild the eSDK:

```bash theme={null}
kas shell <YOUR KAS CONFIG> -c "bitbake packagegroup-robotics-proprietary packagegroup-oss-with-prop-deps packagegroup-robotics-opensource -c cleansstate"
```