> This page is for version 4.3.
> For other versions, use one of these documentation indexes:
> - 4.6 (Latest) (default): https://docs.nvidia.com/holoscan/sdk-user-guide/4-6-latest/llms.txt
> - ltsb-2.0: https://docs.nvidia.com/holoscan/sdk-user-guide/ltsb-2-0/llms.txt
> - 4.5: https://docs.nvidia.com/holoscan/sdk-user-guide/4-5/llms.txt
> - 4.4: https://docs.nvidia.com/holoscan/sdk-user-guide/4-4/llms.txt
> - 4.3: https://docs.nvidia.com/holoscan/sdk-user-guide/4-3/llms.txt
> - Archives: https://docs.nvidia.com/holoscan/sdk-user-guide/archives/llms.txt

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# holoscan::make_unexpected

> Construct a new unexpected object.

```cpp showLineNumbers={false}
template <class E>
static constexpr unexpected<E> holoscan::make_unexpected(
    E &&e
)
```

Construct a new unexpected object.

**Returns:** The unexpected object

**Template parameters**

**`E`** `class`

The type of the error class

---

**Parameters**

**`e`** `E &&`

The object of the error class

---