title: Cannot build Azure Data Factory project in VS 2015
body: <p>I cannot build my Azure Data Factory project in Visual Studio 2015 (Update 3).</p>
  
  <p>I'm getting this error:</p>
  
  <pre><code> Error    The "ADFCompilerTask" task failed unexpectedly.
  
  System.AggregateException: One or more errors occurred. ---&gt;
  
  System.NotImplementedException: Not implemented (Exception from HRESULT: 0x80004001 (E_NOTIMPL))   
   at EnvDTE.Project.get_FileName()  
   at Microsoft.VSAuthoring.SDK.BuildSystem.JsonCompilerTask.get_ProjectHierarchy()
   at Microsoft.WindowsAzure.DataFactoryStudio.DataFactoryProject.ProjectSystem.ADFCompilerTask.&lt;ExecuteAsync&gt;d__2.MoveNext()
   --- End of inner exception stack trace ---    
   at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean  includeTaskCanceledExceptions)    
   at System.Threading.Tasks.Task.Wait(Int32 millisecondsTimeout, CancellationToken cancellationToken)    
   at Microsoft.VSAuthoring.SDK.BuildSystem.JsonCompilerTask.Execute()    
   at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute()
   at Microsoft.Build.BackEnd.TaskBuilder.ExecuteInstantiatedTask&gt;d__26.MoveNext()
   ---&gt; (Inner Exception #0) System.NotImplementedException: Not implemented (Exception from HRESULT: 0x80004001 (E_NOTIMPL))    
   at EnvDTE.Project.get_FileName()    
   at Microsoft.VSAuthoring.SDK.BuildSystem.JsonCompilerTask.get_ProjectHierarchy()
   at Microsoft.WindowsAzure.DataFactoryStudio.DataFactoryProject.ProjectSystem.ADFCompilerTask.&lt;ExecuteAsync&gt;d__2.MoveNext()&lt;--- 
  </code></pre>
  
  <p>In my project I have several datasets/pipeline/linked services defined. All of them could be deployed by copying into Azure Portal, so it does not look like validation issue.</p>
  
  <p>I've tried reinstalling Azure DataFactory Tools, but it didn't help.</p>
  
  <p>I work on Windows 7 using Visual Studio 2015 Version 14.0.25431.01 Update 3,   Azure Data Lake Tools 2.2.5000 and Azure DataFactory Tools 0.9.3527.2 . </p>
  
  <p>How can I fix this issue?   </p>