I’ve recently started playing with Aptana and RadRails under Windows, where I encountered a problem where Aptana wasn’t able to install gems, and it popped up the installation window each time I started Aptana. It is logged as a known issue but I wanted it working, so I persevered.

The upshot of it is, I looked at the Rails console within Aptana at what commands were being run. Most of the where, for example:

gem install rails -l

All I did, is take each of the commands run automatically from the console and removed the -l option:

gem install rails

Everything installed perfectly in no time at all, and it’s all now up and running!