nbsp; It returns <b>nil</b> if the contents of the pasteboard have changed (if the change count has been incremented by a <b>declareTypes:num:owner</b> message) since they were last checked with the <b>types </b>method. It also returns <b>nil</b> if the pasteboard server can't supply the data in time--for example, if the pasteboard's owner is slow in responding to a <b>pasteboard:provideData:</b> message and the interprocess communication times out.&nbsp; All other errors raise an NX_pasteboardComm exceptio