title: Cannot open SSIS package (.dtproj file) after reinstalling Visual Studio 2015
body: <p>I have made an SSIS-package in Visual Studio 2015. A bit after, I had to reinstall VS because there was some trouble with an unrelated package. Now when I try to open the SSIS-package, I first get the following popup:</p>
  
  <pre><code>The 'ResourceManagerPackage' package did not load correctly.
  
  The problem may have been caused by a configuration change or by the installation of another extension. You can get more information by examining the file 'C:\Users\xxx\Appdata\Roaming\Microsoft\VisualStudio\14.0\ActivityLog.xml'.
  
  Restarting Visual Studio could help resolve this issue.
  
  Continue to show this error message?
  </code></pre>
  
  <p>The popup pops up even when I just start VS.</p>
  
  <p>After I click ok, the project does not load. In Solution Explorer, it says 'incompatible', and when I hover over it it says 'The application is not installed'.</p>
  
  <p>How do I fix this?</p>
  
  <p><strong>edit</strong> I have run a repair of VS, and added the SSDT manually, no improvement. I have also opened the ActivityLog as suggested in the popup and searched for errors. I found this:</p>
  
  <pre><code>Could not load file or assembly 'Microsoft.AnalysisServices.Project, Version=13.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91' or one of its dependencies. The system cannot find the file specified. 
  
  Could not load file or assembly 'Microsoft.ReportingServices.Designer, Version=13.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91' or one of its dependencies. The system cannot find the file specified.
  </code></pre>
  
  <p>This might be it, but since I cannot even open the solution, I do not know how to fix it anyway.</p>