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# init(fileURL:versionChecksum:)

Creates an object model reference for the model at the specified file URL.

```
init(fileURL: URL, versionChecksum: String)
```

## Parameters

`fileURL`

The on-disk location of the managed object model.

`versionChecksum`

The checksum of the object model’s version.

## Discussion

To determine an object model’s version checksum, use its [`versionChecksum`](/documentation/CoreData/NSManagedObjectModel/versionChecksum) property. Alternatively, you can find the checksum in the versioned model’s `VersionInfo.plist` file or in Xcode’s build log.

---

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