It seems that netx.jar is no longer produced and /usr/share/icedtea- web/javaws.jar can be used instead. So here is a patch to replace netx.jar by javaws.jar.
** Patch added: "netx.jar has been merged in javaws.jar" https://bugs.launchpad.net/ubuntu/+source/sweethome3d/+bug/1820496/+attachment/5246999/+files/1-6.1.2+dfsg-1ubuntu2.debdiff -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1820496 Title: disco: sweethome3d cannot start because /usr/share/icedtea- web/netx.jar is missing To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/sweethome3d/+bug/1820496/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs