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I'm curious if anyone here knows how to have a user redirected to a web page (URL/Datapage/Etc) if a datapage that requires a parameter notices that parameter has not been received for any reason. For example, our users upon login are directed to a page where they select from a dropwon project they are working on. The project that is selected passes a Project_ID parameter that is required in many other datapages in our system. This is so that the user does not have to repeatedly select the project on each datapage after. This parameter is currently stored in the browser cache and frequently over time is either corrupted or removed from the browser cache. Thus making any datapage that normally receives the *Required parameter Project_ID display some sort of error due to the lack of the parameter. I would like to choose a URL/datapage/etc that would be a redirect destination if this required parameter is not present. In my previous example this destination would be the webpage where the user selects the Project and can pass the Project_ID parameter again. Ideally it would function similarly to basic authentication redirections where it checks the datapage attempting to be accessed against some specified criteria and redirects they user if the criteria is not satisfied. If anyone has accomplished something similar to this I'd be eager to hear about it. Thanks in advance