The latest/current version of V4 Oberon for Linux (1.7.02 from SourceForge https://sourceforge.net/projects/oberon/files/Oberon%20V4%20for%20GNU_Linux/... dated 2004) contains a bootstrap loader written in an outdated C version and some syntax problems in the start script. With a lot help of ChatGPT I was able to update the C code so that it compiles an runs under a more recent 64bit version (bookworm, i.e. oldstable). see https://github.com/btreut/Oberon4Linux-Bootstrap All testers and feedback is welcome.