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Nov 7, 2025
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Update BUILD.md with build failure troubleshooting #1317

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13 changes: 13 additions & 0 deletions BUILD.md
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Expand Up @@ -163,3 +163,16 @@ You may see this warning in IntelliJ:
> `Duplicate content roots detected: '.../processing4/java/src'`

This happens because multiple modules reference the same source folder. It’s safe to ignore.


### Build Failed

If the build fails with `Permission denied` or `Could not copy file` errors, try cleaning the project.

Run:

```bash
./gradlew clean
```

Then, rebuild the project.