Rails - Jul 2014 - WARN: Unresolved specs during Gem::Specification.reset:

Hello, 

I installed cucumber with rspec and the ruby-racer. 

But when I do cucumber I see these error messages: 

WARN: Unresolved specs during Gem::Specification.reset:
      rake (>= 0.8.7)
WARN: Clearing out unresolved specs.
Please report a bug if this causes problems.


How to solve this ?

Roelof

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