I had the same problem and was fixed by following commands (Running on Kubuntu 24.04)
Normal java command (this not allow freeplane to run): java --version openjdk 21.0.7 2025-04-15 OpenJDK Runtime Environment (build 21.0.7+6-Ubuntu-0ubuntu124.04) OpenJDK 64-Bit Server VM (build 21.0.7+6-Ubuntu-0ubuntu124.04, mixed mode, sharing) And this was steps to run Freeplane on terminal (session) not system wide. sudo apt install openjdk-11-jre export JAVA_HOME=/usr/lib/jvm/java-11-openjdk-amd64 export PATH=$JAVA_HOME/bin:$PATH And freeplane started normally Hope that helps others to run - but not sure if freeplane will be updated to never version of java. IMPORTANT: Of course this solution allows to run Freeplane. But is uses old Java version which can be security risk. Worth to consider to run this in VirtualMachine or containers. Please keep this in mind. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2034752 Title: broken with newer java To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/freeplane/+bug/2034752/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
