title: Error 4: SELECT `Message` FROM `Error` WHERE `Error` = 1707 (also 1709)
body: <p>I created an MSI installer with WiX 3.8 and I get this error at the very end of the MSI log when installing it:</p>
  
  <pre><code>[...]
  Property(C): WIXUI_INSTALLDIR_VALID = 1
  === Logging stopped: 8/20/2014  19:15:03 ===
  Note: 1: 1707 
  Note: 1: 2205 2:  3: Error 
  Note: 1: 2228 2:  3: Error 4: SELECT `Message` FROM `Error` WHERE `Error` = 1707 
  Note: 1: 2205 2:  3: Error 
  Note: 1: 2228 2:  3: Error 4: SELECT `Message` FROM `Error` WHERE `Error` = 1709 
  Product: CmisSync Shell Extension -- Installation completed successfully.
  
  Windows Installer installed the product. Product Name: My Shell Extension. Product Version: 0.2.23. Product Language: 1033. Manufacturer: Me. Installation success or error status: 0.
  
  Grabbed execution mutex.
  Cleaning up uninstalled install packages, if any exist
  MainEngineThread is returning 0
  === Verbose logging stopped: 8/20/2014  19:15:03 ===
  </code></pre>
  
  <p>How can I fix these errors?<br>
  Or maybe they are known WiX/MSI issues that can be safely ignored?</p>
  
  <p>My WiX script is extremely simple, it just installs a shell extension, so I have no idea where this error comes from.</p>
  
  <p>From the GUI point of view, the installation finishes with no visible problem. All files are present as expected in the target installation folder.</p>