# Error while installing Cucumber in IronRuby 1.1.1

**URL:** <https://www.ruby-forum.com/t/error-while-installing-cucumber-in-ironruby-1-1-1/198767>\
**Category:** IronRuby\
**Created:** [November 7, 2010, 1:36pm UTC](https://www.ruby-forum.com/t/error-while-installing-cucumber-in-ironruby-1-1-1/198767 "2010-11-07T13:36:11Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Dobai-Pataky\_BSSSSl](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/77aa72/32.png) [@Dobai-Pataky\_BSSSSl](https://www.ruby-forum.com/u/Dobai-Pataky_BSSSSl)\
**Post date:** [November 7, 2010, 1:36pm UTC](https://www.ruby-forum.com/t/error-while-installing-cucumber-in-ironruby-1-1-1/198767/1 "2010-11-07T13:36:11Z")

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Hi there,

While I try to install Cucumber in IronRuby 1.1.1, and I got this error:

ERROR:While executing gem… (TypeError)  
can’t convert NilClass into String

Looks like it is a null class exception. But I could not locate the  
error just base on the error message.

Anyone have this problem before? Any help would be appreciated

Thanks in advance

Leo

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**Author:** ![jialiang\_l](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/e5b9ba/32.png) [@jialiang\_l](https://www.ruby-forum.com/u/jialiang_l)\
**Post date:** [November 7, 2010, 3:26pm UTC](https://www.ruby-forum.com/t/error-while-installing-cucumber-in-ironruby-1-1-1/198767/2 "2010-11-07T15:26:01Z")

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Hi Leo,

There seems to be a general problem with the new igem installer. I  
haven’t  
been able to figure it out, but there’s a fair bit of discussion on a  
previous thread (without resolution). I am looking forward to this  
being  
fixed.

Most gems I have tried to install since upgrading give me this same  
NilClass  
error message.

Mike

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**Author:** ![jialiang\_l](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/e5b9ba/32.png) [@jialiang\_l](https://www.ruby-forum.com/u/jialiang_l)\
**Post date:** [November 9, 2010, 3:45am UTC](https://www.ruby-forum.com/t/error-while-installing-cucumber-in-ironruby-1-1-1/198767/3 "2010-11-09T03:45:58Z")

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Hi Mike,

Thanks for the quick reply.

Too bad there is not solution for this problem. I might install IronRuby  
1.1 and see if it works.

Thanks

Leo