Hi Gabriel,
Thanks for the response. Ok, good to know it is not related to doxygen or Texlive.
Here are my answers to your comments
1- I am doing ./ns3 build // so I'm doing the normal build not the doc one
2- As I said before there was no error in the log upwards. But I ran the build with verbose and I attached the log (beginning of log is cropped though, that's what I could capture from the terminal. Let me know if it is enough or there is a place in the build directory, I can share the full log from)
3- The shell is the integrated VS code bash terminal (bash downloaded with MSys2/Mingw64)
I truly appreciate it if you can point to a resolution.
Regards
Ramy