User EID: 092008777 Location: https://webroster.arizona.edu/ClassRoster/Faculty/Default.aspx?termcode=092 Error: Invalid postback or callback argument. Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation. Stack Trace: at System.Web.UI.ClientScriptManager.ValidateEvent(String uniqueId, String argument) at System.Web.UI.WebControls.DropDownList.LoadPostData(String postDataKey, NameValueCollection postCollection) at System.Web.UI.Page.ProcessPostData(NameValueCollection postData, Boolean fBeforeLoad) at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) ---------------------------------------------------------------------- You are currently subscribed to receive system alert messages sent to the EMSG APPS list. You can send email to the list using the address: emsg-apps@xxxxxxxxxxxxx You can unsubscribe from the list using the address: emsg-apps-request@xxxxxxxxxxxxx with 'unsubscribe' in the subject. If you need assistance, contact the list owners at: emsg-apps-moderators@xxxxxxxxxxxxx