---
lang: en
title: 'API docs: socketio.err_no_multi_server'
keywords: LoopBack 4.0, LoopBack 4, Node.js, TypeScript, OpenAPI
sidebar: lb4_sidebar
editurl: https://github.com/strongloop/loopback-next/tree/master/extensions/socketio
permalink: /doc/en/lb4/apidocs.socketio.err_no_multi_server.html
---

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[Home](./index.md) &gt; [@loopback/socketio](./socketio.md) &gt; [ERR\_NO\_MULTI\_SERVER](./socketio.err_no_multi_server.md)

## ERR\_NO\_MULTI\_SERVER variable

<b>Signature:</b>

```typescript
ERR_NO_MULTI_SERVER: string
```