# S007

> constructor does not fit the declaration keyword

**Severity** Error

Each declaration keyword expects a particular constructor after `=`: `data` takes `subscribe(...)`, `plot` takes a `plot.*` constructor, `pane` takes `pane(...)`, `alert` takes `alert(...)`, `fill` takes `fill.between(...)` and `input` takes an `input.*` call. The right-hand side here belongs to a different kind of declaration.

Use the keyword that matches the constructor, or the constructor that matches the keyword.

## Failing example

```flowscope
script "OI line"
plot oi = subscribe(data.oi)
on oi.close {
  log.info(str.formatVolume(oi.close ?? 0.0))
}
```

## Fixed example

```flowscope
script "OI line"
data oi = subscribe(data.oi)
on oi.close {
  log.info(str.formatVolume(oi.close ?? 0.0))
}
```

## Related

- [S019](/docs/scripting/reference/diagnostics/s019)
- [T405](/docs/scripting/reference/diagnostics/t405)