ERROR: 'rake/rdoctask' is obsolete and no longer supported. Use 'rdoc/task' (available in RDoc 2.4.2+) instead

Question

Seems the last post for this problem was closed for one reason or another so I\'ll try my luck...

I\'m trying to run a simple \"rake db:migrate\" command. When I do,

Answer 1

Oh my god, I was figting with this for almost hour and finally here is my case (may help someone :) ): I got myself multiple rails versions installed so I just uninstalled the latest one as I want to use the most edgy one (the 4.0.1 for now)

so :

$ gem uninstall rails

and I got this:

Select gem to uninstall:
 1. rails-0.9.5
 2. rails-4.0.0
 3. rails-4.0.1
 4. All versions
>

so I selected first two and that was it :) now everything is OK hope this helps someone who got mysteriously stuck as me :(