(@DEFAULT-target)=
# @DEFAULT
Operations related to the @DEFAULT node. The @DEFAULT node is the node that the engine goes to when launched.



## @DEFAULT




 This is the node that the engine goes to when launched. Typically `@DEFAULT` is called if the engine has been sent to a different node and the driver wants to return to the default node. If not already at the @DEFAULT node, the engine exits whatever simulation (i.e. MD, OPTG, etc.) it is performing  (possibly after completing an unfinished time step or geometry optimization step) and returns to the @DEFAULT node.


### Examples


::::{tab-set}

:::{tab-item} Python
:sync: python

```python
import mdi

# connect to the engine
mdi_engine = mdi.MDI_Accept_Communicator()

# initialize a Monte Carlo simulation
mdi.MDI_Send_Command("@DEFAULT", mdi_engine)

```
:::

:::{tab-item} C++
:sync: cpp

```cpp
#include "mdi.h"

// connect to the engine
MDI_Comm mdi_engine = MDI_Accept_Communicator();

// initialize a Monte Carlo simulation
MDI_Send_Command(">@DEFAULT", mdi_engine);

```
:::

::::