Greg reported having an issue when trying to import into Excel XML created by bs1170gain. While having a closer look at it, it turned out that it was indeed true on Windows. We suspect it was introduced by the good folks over there @mingw-64.org having made changes to their tool not being backward compatible (i.e. being another instance of what we’d like to call "software erosion".) Fortunately, it was easy to adapt bs1770gain accordingly.