another uri rewrite

any URL with symbol never reaches the server (in this case BIG-IP virtual server) as it is a BROWSER identifier. If your application is generating such URLs perhaps it is easier to change the application? If not then you can use the STREAM profile and replace your rogue URLs starting from "/abc/login.htmlrecord=" with "/abc/login.html?record=" in backend RESPONSES in HTTP_RESPONSE event. After that the query string can be accessed with HTTP::query inside the HTTP_REQUEST event and you can carry on with the rewrite logic.