(set_extra_file)=
# set extra_file
Specify the name of the extra ascii model file that is used when running SHOP through the SIM interface.

|   |   |
|---|---|
|Options|nan|
|License|SHOP_OPEN|
|Release version|13.0.0.a|

```{contents}
:local:
:depth: 1
```

## Changing the name of the extra_data file
To change the name of the extra_data file, use the command:
```
set extra_file <filename.ascii>
```

The default filename is "extra_data.ascii".

The command must be given before simulation starts.