title: PivotTable Field List Error - Current session is no longer valid due to structural changes in the database
body: <p>I have an Analysis Services database. The cube Storage Mode is MOLAP and Proactive Caching is set to Off. All dimensions, measures and partitions have MOLAP set as Storage Mode and Proactive Caching set to Off as well.</p>
  
  <p>When I'm connecting to the cube through Excel or SQL Server Management Studio, everything works great.</p>
  
  <p>But users connect to the cube through web pages. We use Office Web Components. They were working fine until recently, users encounter the below error randomly when filtering dimension, expanding, collapsing, etc...:
  Current session is no longer valid due to structural changes in the database</p>
  
  <p>First the PivotTable returns blank. When they try to refresh data, they get the below error message.</p>
  
  <p><img src="https://i.stack.imgur.com/xkgdJ.png" alt="Error"></p>
  
  <p>Help.</p>
  
  <p>Thanks,</p>
  
  <p>Mona</p>