Hi,
I'm using VisualMicro with MS VS Community 2019.
Yesterday I've updated VsMicro to the latest version. Since then, I am not able to compile the projects anymore. I get the following error:
System.Exception: Problem moving GSMclass.hpp to the build folder ---> System.IO.FileNotFoundException: Could not find file xxxxx.hpp'
Note: I've edited out specific path details.
The mentioned folder exists, and contains some of the header and source files from the project. 
On the other hand, xxxxx.hpp does not exist, but it is included in the solution/project. The .ino file can be loaded in the Arduino IDE and complies without issues.
I have tried the following, without success:
1. Create a new VsMicro project: I have the same issue when adding/creating new header files in the project.
2. Uninstalling and reinstalling both MS VS Community and VisualMicro.
I would like to ask for support so solve the issue. 
Thank you

Thank you for getting back to me so quickly. 
It seems I made some progress in finding the root cause of the problem:
I have the habit of using the extension "hpp" for header files containing class definitions. 
The issue appears when the solution contains files with such extension
The attached sample solution contains "Header.hpp" leading to this issue. If I rename it to "Header.h", it compiles without any issue.
Please note, that solutions containing "hpp" files compiled fine with previous versions of VM.

Is this related to an issue I have using v2021.106.18? 
It's a .h file which should be ok if I read the above posts correctly.
Other solutions/projects are ok, but this one fails.
This is the output:
===================
Compiling 'ESP32-PICO-D4_T-MICRO32' for 'ESP32 Pico Kit'
System.Exception: Problem moving Arduino.h to the build folder ---> System.IO.FileNotFoundException: Could not find file 'R:\Temp\VMBuilds\ESP32-PICO-D4_T-MICRO32\esp32_pico32\Release\Arduino.h'.
   at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
   at System.IO.File.SetAttributes(String path, FileAttributes fileAttributes)
   at Visual.Micro.MiroAppAPI.SketchBuilder.preprocess(String buildPath, PdePreprocessor preprocessor, Boolean PreProcessOnly)
   --- End of inner exception stack trace ---
   at Visual.Micro.MiroAppAPI.SketchBuilder.preprocess(String buildPath, PdePreprocessor preprocessor, Boolean PreProcessOnly)
   at Visual.Micro.MiroAppAPI.SketchBuilder.preprocess(String buildPath, Boolean PreProcessOnly)
   at Visual.Micro.MiroAppAPI.SketchBuilder._build(String lbuildPath, Boolean verbose, Boolean PreProcessOnly)
   at Visual.Micro.MiroAppAPI.SketchBuilder._build(Boolean verbose)
   at Visual.Micro.MiroAppAPI.SketchBuilder.build(Boolean verbose)
   at Visual.Micro.Visual.Studio.Arduino.AddInApp._CompileDo(Object oProject, Boolean IsDebugStartCommand, Boolean isRebuild, Boolean UseGdbIfAvailable)
   at Visual.Micro.Visual.Studio.Arduino.AddInApp.CompileDo(Object oProject, Boolean IsDebugStartCommand, Boolean isRebuild, Boolean UseGdbIfAvailable)
   at Visual.Micro.Visual.Studio.Arduino.AddInApp.Compile(Object oProject, Boolean IsDebugStartCommand, Boolean IsRebuild, Boolean UseGdbIfAvailable)
============================================

Thanks!