Environment: VisualGDB 5.4 (preview 4, build 2394) with VS Community Edition 2017 (15.8.2)

Target: STM32F746NG (on STM32F746G-DISCOVERY board)

Problem summary: project items (links to source files) that were moved within the project tree to another filter (Solution Explorer branch) are lost during VisualGDB project template export and subsequent import as a new project.

Steps to reproduce:

1. Run VS with VisualGDB installed
2. If any solution is automatically loaded during startup, close it (File->Close Solution)
3. Create new project and solution (File->New->Project)
   1. New Project page: Select Installed->VisualGDB->Embedded Project Wizard, Name = Test1, Create directory for solution = CHECK, Solution name = Test (or any other unique name)
   2. Project type page: Create a new project with = MSBuild, Embedded binary (.elf) = check, Additional output binaries: bin = check, leave all other settings default
   3. Device selection page: STM32F746NG, leave all other settings default, press Next
   4. Sample selection page: STM32 CubeMX Samples tab, select LTDC_PicturesFromSDCard sample project, leave all other settings default
   5. Debug method page: Debug using = OpenOCD, JTAG/SWD programmer = ST-Link v2.1, leave all other settings default, press Finish
4. Build the project (Build->Build solution) – builds without errors
5. Export the project as a VisualGDB project template (first we will create a working template)
   1. Select File -> Export VisualGDB Project Template menu item
   2. In Export Project Template dialog select Test1 item, Template file to create = C:\TestB.vgdbxpt (or any other valid file path)
   3. Press OK
6. Add new project from template (File->Add->New Project)
   1. New Project page: Select Installed->VisualGDB->Embedded Project Wizard, Name = Test2 (or any other unique name)
   2. Project type page: Create a project from a custom template = CHECK, Template file = C:\TestA.vgdbxpt, press Next
   3. Device selection page: leave all settings default, press Next
   4. Debug method page: leave all settings default, press Finish
7. Build the project (Build->Build solution) – builds without errors, as expected
8. Export the project as a VisualGDB project template (now we will create a non-working template)
   1. Create a small modification of the original project: Open Test1 -> Source Files -> Shared resources branch in Solution Explorer, select all the files in that branch and drag them into Test1 -> Source Files -> Device-specific files branch (note that original Test1 project still builds without errors if you do a full or partial rebuild at this point, so this modification in itself is not invalid)
   2. Select File -> Export VisualGDB Project Template menu item
   3. In Export Project Template dialog select Test1 item, Template file to create = C:\TestB.vgdbxpt (or any other valid file path)
   4. Press OK
9. Add new project from template (File->Add->New Project)
   1. New Project page: Select Installed->VisualGDB->Embedded Project Wizard, Name = Test3 (or any other unique name)
   2. Project type page: Create a project from a custom template = CHECK, Template file = C:\TestB.vgdbxpt, press Next
   3. Device selection page: leave all settings default, press Next
   4. Debug method page: leave all settings default, press Finish
10. Inspect Test3 -> Source files -> Device-specific files branch in Solution Explorer – the files that we have dragged in original project did not propagate to the Test3 project through the template.
11. Build the project (Build->Build solution). Multiple linker errors will result due to the fact that the source files as described above are now missing and did not compile.

Interestingly enough, I experimented with other ways to modify the project and this is it what I could observe:

1. If you rename Shared resources filter in Test1 -> Source Files branch in the Solution Explorer instead of dragging the files to Device-specific files filter before creating a template, then the files in question will not disappear when a new project is created from such template.
2. If you create a new filter (folder) in the Solution Explorer under Test1 -> Source Files branch and drag the files there from the Shared resources filter before creating a template, then the files in question will not disappear when a new project is created from such template.
3. If you drag the files from Shared resources filter Test1 -> Source Files branch in the Solution Explorer into Src filter under the same Test1 -> Source Files branch before creating a template, then the files in question will not disappear when a new project is created from such template.
4. So they only disappear when you drag files into Device-specific files filter before creating a template.