# Error when installing Watir for IronRuby

**URL:** <https://www.ruby-forum.com/t/error-when-installing-watir-for-ironruby/175836>\
**Category:** IronRuby\
**Created:** [September 21, 2009, 6:15am UTC](https://www.ruby-forum.com/t/error-when-installing-watir-for-ironruby/175836 "2009-09-21T06:15:38Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![metanoize](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/9fc29f/32.png) [@metanoize](https://www.ruby-forum.com/u/metanoize)\
**Post date:** [September 21, 2009, 6:15am UTC](https://www.ruby-forum.com/t/error-when-installing-watir-for-ironruby/175836/1 "2009-09-21T06:15:38Z")

</div>

I updated my gem for Ruby (Not IronRuby) to 1.3.5

C:\DevTools\IronRuby\ironruby\Merlin\Main\Languages\Ruby\Scripts\bin\>ir  
igem -v  
1.3.5

C:\DevTools\IronRuby\ironruby\Merlin\Main\Languages\Ruby\Scripts\bin\>ir  
igem ins  
tall watir  
ERROR: While executing gem … (RangeError)  
bignum too big to convert into Fixnum

Any ideas about the above error?