# ApplicationPipeline not found

**URL:** <https://discourse.laminas.dev/t/applicationpipeline-not-found/2494>\
**Category:** Mezzio\
**Created:** [September 6, 2021, 3:03pm UTC](https://discourse.laminas.dev/t/applicationpipeline-not-found/2494 "2021-09-06T15:03:57Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![FBurner](https://yyz2.discourse-cdn.com/flex032/user_avatar/discourse.laminas.dev/fburner/32/1120_2.png) [@FBurner](https://discourse.laminas.dev/u/FBurner)\
**Post date:** [September 6, 2021, 3:03pm UTC](https://discourse.laminas.dev/t/applicationpipeline-not-found/2494/1 "2021-09-06T15:03:58Z")

</div>

I have updated to mezzio 3.0 due to php 8.0 update and now getting this error.  
The ApplicationPipeline is in the same namespace as the application factory but its not there

```auto
<?php

declare(strict_types=1);

namespace Mezzio\Container;

use Laminas\HttpHandlerRunner\RequestHandlerRunner;
use Mezzio\Application;
use Mezzio\ApplicationPipeline;
use Mezzio\MiddlewareFactory;
use Mezzio\Router\RouteCollector;
use Mezzio\Router\RouteCollectorInterface;
use Psr\Container\ContainerInterface;

/**
 * Create an Application instance.
 *
 * This class consumes three other services, and one pseudo-service (service
 * that looks like a class name, but resolves to a different resource):
 *
 * - Mezzio\MiddlewareFactory.
 * - Mezzio\ApplicationPipeline, which should resolve to a
 * Laminas\Stratigility\MiddlewarePipeInterface instance.
 * - Mezzio\Router\RouteCollector.
 * - Laminas\HttpHandler\RequestHandlerRunner.
 */
class ApplicationFactory

```

* * *

` Uncaught Laminas\ServiceManager\Exception\ServiceNotFoundException: Unable to resolve service "Mezzio\ApplicationPipeline" to a factory; are you certain you provided it during configuration? in /home/sps/project/vertical/latest/vendor/laminas/laminas-servicemanager/src/ServiceManager.php:588`

---

<div class="post-metadata">

**Author:** ![guidofaecke](https://yyz2.discourse-cdn.com/flex032/user_avatar/discourse.laminas.dev/guidofaecke/32/427_2.png) [@guidofaecke](https://discourse.laminas.dev/u/guidofaecke)\
**Post date:** [October 27, 2021, 5:13am UTC](https://discourse.laminas.dev/t/applicationpipeline-not-found/2494/2 "2021-10-27T05:13:19Z")

</div>

My first thought would be checking if there is a config cache file in the data directory and delete it.