```ruby
# coding: utf-8

module ONIX
  module ListWriter
    
    def list_writer(name, options = {})
      options.symbolize_keys!
      unless options.is_a?(Hash) && options[:list].is_a?(Integer)
        raise ArgumentError, "Must specify code list number as ':list => Integer'"
      end
      define_method("#{name}=") do |value|
        if value.nil? || ONIX::Lists.list(options[:list]).keys.include?(value)
          self.instance_variable_set("@#{name}", value)
        else
          raise ArgumentError, "Invalid #{name} value: #{value}"
        end
      end
    end
    
  end
end
```

Improve invalid list value error message
user
```ruby
# coding: utf-8

module ONIX
  module ListWriter
    
    def list_writer(name, options = {})
      options.symbolize_keys!
      unless options.is_a?(Hash) && options[:list].is_a?(Integer)
        raise ArgumentError, "Must specify code list number as ':list => Integer'"
      end
      define_method("#{name}=") do |value|
        if value.nil? || ONIX::Lists.list(options[:list]).keys.include?(value)
          self.instance_variable_set("@#{name}", value)
        else
          raise ArgumentError, "Invalid #{("_" + name.to_s).downcase.gsub!(/_(.)/) { $1.upcase }} '#{value}' -- Refer to ONIX Code List #{options[:list]}"
        end
      end
    end
    
  end
end
```
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