If I comment out "return casePage;" then my debugging messages appear in my System Log, but if uncommented the page redirects and no messages appear.  Why would this be?

Thanks.

           if(myModelID != NULL && parentcase != NULL) {
                System.debug('if all is well');
                for (String i : myModelID) {
             
                        System.debug(i);
                        System.debug(parentcase);
                       
                }

                PageReference casePage = new PageReference('/' + parentcase);
                casePage.setRedirect(true);

                return casePage;

           }