-<% json_map = JSON.parse(@params['report_additional_info']).map %>
-<% map_to_s = json_map.map {|k,v| "#{k}=#{v}"}.join("\n") %>
+<% if @params['report_additional_info'] %>
+<% map_to_s = JSON.parse(@params['report_additional_info']).map {|k,v| "#{k}=#{v}"}.join("\n") %>