If you want to save/export citations from the catalog, you’ll want to do so using OneSearch instead, as the RefWorks export from the catalog no longer works. The CUNY Office of Library Services says it is unlikely there will be a way to fix this problem.
Another option that offers students more flexibility in the long run is to suggest Zotero instead, which still works fine with the catalog as well as OneSearch and all of our bibliographic databases (and Amazon, nytimes.com, Wikipedia, etc.).