I am try to run this method in RubyMine:

```
def test(a = "Ruby", b = "Rails")
  puts "The default value of a is #{a}."
  puts "The default value of b is #{b}."
end 
test("Hello", "World")

```

However, I keep getting this error:

```
16:06:41 Error running rubyProgamming: Cannot find RCov executable Ruby script for ruby-2.0.0-p481 (/usr/bin/ruby) SDK.

```

Any clues to what this means or how I can fix this? 

Thanks