# FORGE_API_INVALID

FORGE_API is not a supported whole number, or is set more than once.

## What happened

`FORGE_API` is not a whole number Forge supports, is set more than once, is not written as a plain number, or is set inside a block instead of at the top of the file.

## What to do

Write `FORGE_API = 1` once, at the top level, near the top of the file.

## Example

```text
strategy.py, line 1: FORGE_API = 2 is not supported; supported: 1 [FORGE_API_INVALID]
```

The wording of the message depends on your file, and the code does not. An error stops the file from loading.