The error "Could not load file or assemb

The error "Could not load file or assembly 'Microsoft.AnalysisServices.SharePoint.*' can be solved by deploying the PowerPivot solution for the specific web application that will contain PowerPivot files. Deploy the solution package: 1.In Central Administration, in System Settings, click Manage farm solutions. 2.Click Powerpivotwebapp. 3.Click Deploy Solution. 4.Choose the web application for which this error is occurring. If there is more than one web application, redeploy the solution for all of hem. 5.Click OK.