You must define OPENEDX_RELEASE

Peace upon those who believe,

When trying to install OpenEdx IroWood on Ubuntu 16.04 32bits,
the first and second commands work,
but when trying the last one, the command of installation, it responds to me: “you must define OPENEDX_RELEASE”, although I’ve run export OPENEDX_RELEASE=open-release/ironwood.master !

Yeah @Tunizoo . There is some issue there.
For work around, replace OPENEDX_RELEASE with desired openedx version on the url which you are trying to execute.
It will definitely work!!

I don’t think there is a problem with the installation scripts, but if there is, we’d like to know more about it. Can you provide more details? Try the steps again, and pastebin the terminal session contents so we can see what happened.