Compass compile error: "NoMethodError on line 264"

When I try to do a compass compile for my project I get this :

PHP Code:

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NoMethodError on line 264 of /Library/Ruby/Gems/1.8/gems/compass-0.12.2/lib/compass/configuration/inheritance.rb: relative_path 


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The compass compile worked earlier, but at some point this happened but I cant find out what went wrong. Does anyone know what to look for to solve this problem?

This looks to be an issue with your install or your config.rb.

I have compass 0.12.2 installed and have no issues with compiling an Ext JS 4 app.

It was my config.rb that needed to be fixed and also the util.rb in the ExtJs library. Thank you for the suggestion.