title: Class not registered Error
body: <p>Running an application from Visual Studio 2012 on 64-bit computers, displays the following error message: </p>
  
  <blockquote>
    <p>Retrieving the COM class factory for component with CLSID {F2D4F4E5-EEA1-46FF-A83B-A270C92DAE4B} failed due to the following error: 80040154 Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG))</p>
  </blockquote>
  
  <p>I am using Inventor packandgo dll library in visualstudio.</p>
  
  <p>Anyone know what is the error?</p>