Hello, I'm encountering some weird behavior when trying to update a view using windowControllerDidLoadNib after loading in a persistent document. When I provide windowControllerDidLoadNib a single argument, as shown below (and required by the NSDocument class definition and in every example I've seen), Xcode says: `windowControllerDidLoadNib:': wrong number of arguments (1 for 0) (ArgumentError) If I don't provide any argument, it says: undefined method `windowControllerDidLoadNib' for #<MyDocument:0x200646660> (NoMethodError) *I've tried every combination of one or no args for both the method signature and "super" call on the next line, and I can't seem to get any different results.* This is my first time trying to get persistence going, but I've read a lot about it, and everything else is working well.. it saves and loads, but I can't seem to get this hook working to update the GUI upon loading. * * * * class MyDocument < NSDocument attr_accessor :loadedmodel, :root #outlet to model field of controller # Name of nib containing document window def windowNibName 'MyDocument' end # Document data representation for saving (return NSData) def dataOfType(type, error:outError) outError.assign(NSError.errorWithDomain(NSOSStatusErrorDomain, code:-4, userInfo:nil)) NSKeyedArchiver.archivedDataWithRootObject(@root.model) end # Read document from data (return non-nil on success) def readFromData(data, ofType:type, error:outError) outError.assign(NSError.errorWithDomain(NSOSStatusErrorDomain, code:-4, userInfo:nil)) @loadedmodel = NSKeyedUnarchiver.unarchiveObjectWithData(data) end # Return lowercase 'untitled', to comply with HIG def displayName fileURL ? super : super.sub(/^[[:upper:]]/) {|s| s.downcase} end def windowControllerDidLoadNib(aController) super(aController) @root.model = @loadedmodel NSLog("model loaded") end end Regards, Tom Jordan