Using Windows 10, Visual Studio 2017, and latest version of Visual Micro... "Toggle Hidden Files" does not work and I get the following in the "Output" window:

Error during processing of the command. Please review or post the stack trace in the www.visualmicro.com forumA sub filter with name "src" already exists. (Visual.Micro.Visual.Studio.Arduino.Helper.StandardAddItemShowAllFiles)
System.ArgumentException: A sub filter with name "src" already exists.
   at Microsoft.VisualBasic.CompilerServices.LateBinding.LateGet(Object o, Type objType, String name, Object[] args, String[] paramnames, Boolean[] CopyBack)
   at Microsoft.VisualBasic.CompilerServices.NewLateBinding.LateGet(Object Instance, Type Type, String MemberName, Object[] Arguments, String[] ArgumentNames, Type[] TypeArguments, Boolean[] CopyBack)
   at Visual.Micro.Visual.Studio.Arduino.AddInApp.AddBoardCoreToProject(Object oProject, Board oBoard, Boolean forceShowExtraFiles, String nickName, Boolean linkFiles, Boolean incLibFolder)
   at Visual.Micro.Visual.Studio.Arduino.AddInApp.ShowAllExtraFiles(Project oProject)
   at Visual.Micro.Visual.Studio.Arduino.AddInApp.ShowAllFilesToggle()
   at Visual.Micro.Visual.Studio.Arduino.AddInApp.ExecCmd(String commandName)


I rely on this to show students how to find Arduino & Library source code and headers.  Snap shot of project folders is attached.

Rich

Hi Tim,

I saw there was 1 update for Visual Studio, and so I installed it.  I then deleted the "src" folder and re-tried the "Toggle Hidden Files".  Results are that the "src" folder was recreated, but Arduino and Library source was not populated within the folder:

Error during processing of the command. Please review or post the stack trace in the www.visualmicro.com forumObject reference not set to an instance of an object. (Visual.Micro.Visual.Studio.Arduino.Helper.StandardAddItemShowAllFiles)
System.NullReferenceException: Object reference not set to an instance of an object.
   at Visual.Micro.Visual.Studio.Arduino.AddInApp.AddBoardCoreToProject(Object oProject, Board oBoard, Boolean forceShowExtraFiles, String nickName, Boolean linkFiles, Boolean incLibFolder)
   at Visual.Micro.Visual.Studio.Arduino.AddInApp.ShowAllExtraFiles(Project oProject)
   at Visual.Micro.Visual.Studio.Arduino.AddInApp.ShowAllFilesToggle()
   at Visual.Micro.Visual.Studio.Arduino.AddInApp.ExecCmd(String commandName)

If there is a log of sorts I could provide to assist your dialog with Microsoft, let me know.  For some reason, my students are not complaining about this problem using 2017, I just can't put it up on projector during class.  My machine is a clean Windows 10 and VS2017 install about 1 month ago.  Like you, I don't like going backwards... eg VS2015... so I will live with this for now... and wish you the best in forging forward on this with MS.

Rich

Your suggestion worked!  One thing I should expound on... I use one solution with 20+ projects.  For some reason, all of them stopped working at the same time a little while ago... it may have been an update of sorts that caused it, I don't know.  The method you suggested did fixed the one project I tested within my solution, leaving the other projects unchanged.  So I can fix projects one by one as needed.  I appreciate you putting in the additional effort to identify this work-around, which provides what I need for the classroom. 

Thank you very much!

Rich

Yes, creating a new solution and then adding an existing project to the new solution did enable the "Toggle Hidden Files" to work for that project.  I then re-opened the original solution with original project, and Toggle Hidden Files remained not working for that project.  Seems there is something not synced between solution/project files, which might help you figure this out.

This may be random info... but one project in my solution that was working... I changed the hardware board type from Adafruit UNO to Feather M0 Express, and then I could no longer enable hidden files.  I removed the project from solution, deleted the _vm directory, *.vcproj and *.vcxproj.filters files, then added existing project back it, and it worked again.

Deleting the .vs folder had no affect, hidden files still did not work.  Creating new solution and adding existing projects enables hidden files to work.

Does it make any difference adding existing projects through right click of "Solution->Add->Existing" verses "vMicro->Open Existing" verse "File->Add->Existing"?  I usually do it through right click of "Solution..."