title: Creating a database diagram crashes SSMS with a memory corruption error
body: <p>I'm working in SQL Server Management Studio Express version. </p>
  
  <p>When I create database diagrams in SQL Server Management Studio, I get an error:</p>
  
  <blockquote>
    <p>Attempted to read or write protected memory. This is often an indication that other memory is corrupt.</p>
  </blockquote>
  
  <p>What's causing this error?</p>