Cannot Open Source File no such file or directory

[Sailanarmo]

I apologize if this is the wrong place to post this question.
I have a project that I am trying to build within a subdirectory structure. The structure goes as follows:

Project
  - Project.pro
  |
  Base
  |  -base.pro
  |  |
  |  Object
  |  |  -object.pro
  |  |  |
  |  |  Dependency1
  |  |  |  - depend1.cpp
  |  |  |  - depend1.hpp
  |  |  |
  |  |  Dependency2
  |  |     - depend2.cpp
  |  |     - depend2.hpp
  |  |
  |  GUI
  |  |  - gui.pro
  |  |  ...Folders and their source files
  |  |
  |  Other Folders
  |    - other .pro files
  |
  External
    |
    ExternalProj1
    |
    ExternalProj2

And as of right now I am only trying to compile the Object's project. However, when I try to get it to compile, it simply gives me the error:

Cannot open source file: '..\..\..\Project\Base\Object\Dependency1\depend1.cpp' No such file or directory
Cannot open source file: '..\..\..\Project\Base\Object\Dependency2\depend2.cpp' No such file or directory

I have tried searching around however most problems with this kind of related question seems to be missing header files which is not what the error is trying to convey here. I have tried making all sorts of modifications to object.pro,base.pro, and Project.pro however all of them have failed and I am kind of stuck on where I need to go from here. Project is a subdir project, and Base and External are also subdir projects. I am not really sure what I need to modify from here in order to get this error to go away.

Here is my base.pro:

TEMPLATE = subdirs

    SUBDIRS += \
      Object \
      GUI \
      Others... 

And object.pro looks like this:

TEMPLATE = lib
TARGET = Object

CONFIG += c++17

HEADERS += \
   $$PWD/Dependency1/depend1.hpp \
   $$PWD/Dependency2/depend2.hpp 

SOURCES += \
   $$PWD/Dependency1/depend1.cpp \
   $$PWD/Dependency2/depend2.cpp 

INCLUDEPATH += \
    $$PWD/Dependency1 \
    $$PWD/Dependency2 

Project.pro looks very similar to base.pro other than it has the subdirs of Base and External. What am I doing wrong? I want to be able to figure this out now so I can fix them when I am trying to build the individual projects that are in the Base Folder and External folder.

Compiler Output:

c1xx: fatal error C1083: Cannot open source file: '..\..\..\Project\Base\Object\Dependency1\depend1.cpp': No such file or directory
depend1.cpp
c1xx: fatal error C1083: Cannot open source file: '..\..\..\Project\Base\Object\Dependency2\depend2.cpp': No such file or directory
jom: C:\Users\<USER>\Documents\Projects\build-Project-Desktop_Qt_5_12_1_MSVC2017_64bit-Debug\Base\Object\Makefile.Debug [debug\Dependency1.obj] Error 2
jom: C:\Users\<USER>\Documents\Projects\build-Project-Desktop_Qt_5_12_1_MSVC2017_64bit-Debug\Base\Object\Makefile.Debug [debug\Dependency2.obj] Error 2
c1xx: fatal error C1083: Cannot open source file: '..\..\..\Project\Base\Object\Dependency2\depend2.cpp': No such file or directory
jom: C:\Users\<USER>\Documents\Projects\build-Project-Desktop_Qt_5_12_1_MSVC2017_64bit-Debug\Base\Object\Makefile [debug] Error 2
09:59:10: The process "C:\Qt\Tools\QtCreator\bin\jom.exe" exited with code 2.
Error while building/deploying project Project (kit: Desktop Qt 5.12.1 MSVC2017 64bit)
When executing step "Make"

[SGaist]

Hi and welcome to devnet,

I don't see anything fundamentally wrong with what you posted.

What I would do, is start smaller and go up step by step.

Start with just building the Object project. Then once it builds, go up one level and repeat until your reached Project. That way you first ensure that Object correctly builds without all the structure of a multilevel subdirs project.

[Sailanarmo]

@SGaist Somehow, when I moved the entire projects into Documents it suddenly found all of the files for some reason. Which I do not really understand, because I created this project in the Projects folder which is in my Documents. Is there a reason for this?

[SGaist]

Well... Currently except gremlins I don't see any specific reasons.

Can you provided a minimal buildable project that reproduces that ?