I managed to have a new version of LeoCAD in Ubuntu 16.04 LTS by downloading a debain package from here
https://packages.debian.org/jessie/amd64...d/download
and using
to install. I now can read and write ldr format models.
Thanks for your help.
https://packages.debian.org/jessie/amd64...d/download
and using
Code:
sudo apt-get install ./leocad_17.07_amd64.deb
Thanks for your help.