# Getting an error in Johnson's env.js

**URL:** <https://www.ruby-forum.com/t/getting-an-error-in-johnsons-env-js/167186>\
**Category:** Ruby\
**Created:** [May 5, 2009, 8:29am UTC](https://www.ruby-forum.com/t/getting-an-error-in-johnsons-env-js/167186 "2009-05-05T08:29:54Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![vikasmaskeri](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/v/6f9a4e/32.png) [@vikasmaskeri](https://www.ruby-forum.com/u/vikasmaskeri)\
**Post date:** [May 5, 2009, 8:29am UTC](https://www.ruby-forum.com/t/getting-an-error-in-johnsons-env-js/167186/1 "2009-05-05T08:29:54Z")

</div>

Hi,  
I am trying to use Johnson gem to run javascript without a browser. But  
the env.js gives me an exception which looks like this

/var/lib/gems/1.8/gems/johnson-1.1.0/lib/johnson/spidermonkey/runtime.rb:58:in  
`native_compile': illegal character at (none):12 (Johnson::Error) from /var/lib/gems/1.8/gems/johnson-1.1.0/lib/johnson/spidermonkey/runtime.rb:58:in`compile’  
from  
/var/lib/gems/1.8/gems/johnson-1.1.0/lib/johnson/spidermonkey/runtime.rb:42:in  
`evaluate' from /var/lib/gems/1.8/gems/johnson-1.1.0/lib/johnson/runtime.rb:21:in`evaluate’  
from test1.rb:802  
from  
/var/lib/gems/1.8/gems/nokogiri-1.2.3/lib/nokogiri/xml/node\_set.rb:140:in  
`each' from /var/lib/gems/1.8/gems/nokogiri-1.2.3/lib/nokogiri/xml/node_set.rb:139:in`upto’  
from  
/var/lib/gems/1.8/gems/nokogiri-1.2.3/lib/nokogiri/xml/node\_set.rb:139:in  
`each' from /var/lib/gems/1.8/gems/taka-0.0.1/lib/taka/dom/node_list.rb:9:in`send’  
from /var/lib/gems/1.8/gems/taka-0.0.1/lib/taka/dom/node\_list.rb:9:in  
`method\_missing’  
from test1.rb:800

Any idea on whats wrong here?