# E3004

Missing parameters list. Add `()` after the name of the function if it takes 0
parameter.

## Erroneous example

```{literalinclude} /sources/error_codes/3004_error/top.mbt
:language: moonbit
```

## Suggestion

Add `()` after the function name.

```{literalinclude} /sources/error_codes/3004_fixed/top.mbt
:language: moonbit
```