[API reference](https://evolu.dev/docs/api-reference) › [@evolu/sqlite-wasm](https://evolu.dev/docs/api-reference/sqlite-wasm) › SahPoolError

```ts
type SahPoolError =
  SahPoolAlreadyOpenError | SahPoolHeldError | SahPoolSetupError;
```

Defined in: [packages/sqlite-wasm/src/SahPool.ts:1099](https://github.com/evoluhq/evolu/blob/bc4578a260dd15d5bbf94b83765ca05984d194cb/packages/sqlite-wasm/src/SahPool.ts#L1099)

Why [openSahPool](https://evolu.dev/docs/api-reference/sqlite-wasm/functions/openSahPool) failed.