Kepler

Same thing happened to me.

The Mac installer (https://code.kepler-project.org/code/kepler/releases/installers/Kepler-2.0-RC2-osx.jar) could not find the R installer.
The message is

The file /Applications/Kepler-2.0-RC2/Kepler.app/Kepler/r-2.0/module-info/R-2.10.1.pkg does not exist.
  Continue Installation?

However, the Windows installer from
https://code.kepler-project.org/code/kepler/releases/installers/Kepler-2.0-RC2-win.jar
worked find, the R installed worked.

Oddly, the Linux installer at
https://code.kepler-project.org/code/kepler/releases/installers/Kepler-2.0-RC2-linux.jar
had a choice for installing R, but I never saw the R splash screen.

R is no longer installed, but must be installed manually.

If a workflow that depends on R fails because R is not present, it ideally should fail gracefully. That isn't happening now.

In fact, we should generalize this. If a workflow fails because a necessary piece of third party software that needs to be installed is not present, the workflow should fail gracefully with an appropriate error message. But this, is definitely a post 2.0 issue.

Original Bugzilla ID was 4987