title: Visual Studio 2017 (Professional) Offline Update Layout Is Missing Packages
body: <p>A while ago I've created a offline install layout for VS2017 Professional (Version 15.5) - this is the base for a couple of dev-hosts at work.</p>
  
  <p>Now we want to upgrade to VS2017 - version 15.8 - so I've createad a 1:1 copy of the existing layout and ran </p>
  
  <pre><code>vs_Professional.exe --layout &lt;path_to_layout&gt; 
  </code></pre>
  
  <p>which ran for a while and updated ?all? packages in the layout.</p>
  
  <p><strong>doing a clean install with this updated layout does work well, however - when using this layout to update one of the hosts that have version 15.5 installed the update procedure fails with exit code "1".</strong></p>
  
  <p>sidenote: VS actually states that it's now 15.8.4 - but it exits with an error code .. so ..?</p>
  
  <p>the command I use for install/update is
  (drop the "update" for the clean installation)</p>
  
  <pre><code>vs_Professional.exe update --passive --norestart --wait --productkey $productKey --nocache --noUpdateInstaller --noWeb
  </code></pre>
  
  <p>using collect.exe there is a state.errors.json file which states that a couple of packages are missing on the layout path...</p>
  
  <p>NOTE: I need to have all required packages available in the offline layout - because some of the PCs do not have internet access (despite we've got the requirement that those vs-setups need to be identical...)</p>
  
  <p>I've tried to reach out to Microsoft Support but didn't hear back from the till now. - anyone else having this issue / was able to solve it?</p>