This problem is occurring in IMan v5, PU10.  I suspect it was also occurring in v4 on a different server but the exact details of that error was not recorded.<br /><br />In Scheduler, schedule a job and after it is completed press the Design tab. It immediately gets as follows. It occurs for any job, in both Firefox and Chrome<br /><br />IMan - An Error Has Occured<br />Error - Object reference not set to an instance of an object.<br />Error Stack Trace<br />at Syncfusion.Web.UI.WebControls.Grid.Grouping.GridGroupingControl.LoadSourceListSet()<br />at Syncfusion.Web.UI.WebControls.Grid.Grouping.GridGroupingControl.LoadViewState(Object savedState)<br />at System.Web.UI.Control.LoadViewStateRecursive(Object savedState)<br />at System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState)<br />at System.Web.UI.Control.LoadViewStateRecursive(Object savedState)<br />at System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState)<br />at System.Web.UI.Control.LoadViewStateRecursive(Object savedState)<br />at System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState)<br />at System.Web.UI.Control.LoadViewStateRecursive(Object savedState)<br />at System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState)<br />at System.Web.UI.Control.LoadViewStateRecursive(Object savedState)<br />at System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState)<br />at System.Web.UI.Control.LoadViewStateRecursive(Object savedState)<br />at System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState)<br />at System.Web.UI.Control.LoadViewStateRecursive(Object savedState)<br />at System.Web.UI.Page.LoadAllState()<br />at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)<br /><br />Do you have any clue as to what may cause this?