GET failed exception for REPL tree

Hi,
We are getting an ‘HttpClient.HandleHTTPError’ exception in our automation project,when we execute the ‘tree’ command from REPL.
We are trying to identify tree structure of native iOS UIElements, which is basically a ‘UIPopOverController’ backed up by a ‘UINavigationController’. & it also has a datepicker in UItableview .The tree command works fine for all the native popover but fails only for this scenario with the datepicker .
Any suggestions would help.Thanks in advance.