Greetings.
Let me collect the suggested responses with their merits and potential issues. 1. Use ditaa.jar that comes with your operating system. Perfect if this works. Seems to work e.g. in Debian, does not seem to work with Fedora. Perhaps because one is a standalone library and the other one is not. Could also be a version number issue. 2. Use the program "ditaa" (not ditaa.jar) that comes with your operating system. This _may_ work, but I have not been able to misuse the settings in ob-ditaa widely enough yet to create a working solution. 3. Copy ditaa.jar from previous version of org. Works in the short run, but I do not think we want to advocate this: "We took ditaa.jar out of org, so you will want to download an earlier version of org to make ditaa work." 4. Use precompiled binary ditaa.jar from some site. Will probably work, but me and some other paranoids try to avoid using binaries from sources which we do not consider reliable. 5. Compile ditaa.jar yourself. At least for me, does not work at the moment. To summarize: on Fedora, no working long-term solution so far. Have fun and stay safe, Jarmo