I-Framework IException Message: can't find route for '/robots.txt'

code 0 on line 124 in file /app/I-F/util/core/IRoute.php

#0 /app/I-F/util/core/IRoute.php(46): IRoute->parse() #1 /app/actions/public/Route.php(7): IRoute->__construct(Object(IURI)) #2 {main}