I am using Obj C with Cocoa Framework. I am using NSTableView in my application. I have bind the columns to an array controller. But initially when ever I am adding objects to the array controller it's not updating the table view. When I close the window and click the icon in the dock, it will open the window as well as window is refreshed will the details. Why is it happening like that. How can I call manual refresh of the window. I tried using NSWindow's "update" as well as NSApplication's "updateWindows" but getting error that selector was not recognized. Please help me in sorting out this problem.