**Inheritance:**
java.lang.Object, java.lang.Throwable, java.lang.Exception, java.lang.RuntimeException, [com.aspose.zip.exceptions.Exception](../../com.aspose.zip.exceptions/exception), [com.aspose.zip.exceptions.SystemException](../../com.aspose.zip.exceptions/systemexception)
```
public class KeyNotFoundException extends SystemException
```

The exception that is thrown when the key specified for accessing an element in a collection does not match any key in the collection.