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Discrepancy with negative tags between Python and C++/Fortran

I was trying to debug the failure of Tutorial t14 in Fortran, when I noticed that the tags in the Python tutorial (t14.py) contained also negative signs while the C++/Fortran ones did not. Is this intentional? I am referring to the contents of the boundary_tags vector:

  • Python: boundary_tags: [-15, 77, ...]
  • C++/Fortran: boundary_tags: {15, 77, ...}

I am using one of the latest, if not the latest, SDKs (01/01/2024)