@pascal jacobs Your mobi-file doesn't have a known internal format. Basically, mobi-files have a very free standard, saying where what files are, but not how the xml-code should be structured.
So KindleUnpack, the tool that I use to decypher the kindle files, quits after it has unpacked the code to raw-xml. My code tries to give a shot at the raw-xml if KindleUnpack fails at this point. However, if it is too different, like this one, you need to write a dedicated converter.
The function convertRAWML2XDXF() gives it a try, but quits gracefully. If you look at the messages displayed, the info is there:
