[ESS] Emacs sends > to R console (causing error)

[chell]

Hello,

I've got the following modifications in my .emacs file which allow me to
open a .R file, press shift+enter and get an R prompt. It works but
apparently ">" gets send to the console; I get the following error message:
> > 
Error: Unexpected '>' in ">"
> 

after that I can enter R commands just fine. I can't figure out what's
causing this so any help would be appreciated! 

(autoload 'R-mode "ess-site.el" "" t)
(add-to-list 'auto-mode-alist '("\\.R\\'" . R-mode))

(eval-after-load "comint"
   '(progn
      (define-key comint-mode-map [up]
        'comint-previous-matching-input-from-input)
      (define-key comint-mode-map [down]
        'comint-next-matching-input-from-input)

      ;; also recommended for ESS use --
      (setq comint-scroll-to-bottom-on-output 'others)
      (setq comint-scroll-show-maximum-output t)
      ;; somewhat extreme, almost disabling writing in *R*, *shell* buffers
above prompt:
      (setq comint-scroll-to-bottom-on-input 'this)
      ))


(setq ess-ask-for-ess-directory nil)
(setq ess-local-process-name "R")
(setq ansi-color-for-comint-mode 'filter)
(setq comint-scroll-to-bottom-on-input t)
(setq comint-scroll-to-bottom-on-output t)
(setq comint-move-point-for-output t)
(defun my-ess-start-R ()
  (interactive)
  (if (not (member "*R*" (mapcar (function buffer-name) (buffer-list))))
      (progn
        (delete-other-windows)
        (setq w1 (selected-window))
        (setq w1name (buffer-name))
        (setq w2 (split-window w1 nil t))
        (R)
        (set-window-buffer w2 "*R*")
        (set-window-buffer w1 w1name))))
(defun my-ess-eval ()
  (interactive)
  (my-ess-start-R)
  (if (and transient-mark-mode mark-active)
      (call-interactively 'ess-eval-region)
    (call-interactively 'ess-eval-line-and-step)))
(add-hook 'ess-mode-hook
          '(lambda()
             (local-set-key [(shift return)] 'my-ess-eval)))
(add-hook 'inferior-ess-mode-hook
          '(lambda()
             (local-set-key [C-up] 'comint-previous-input)
             (local-set-key [C-down] 'comint-next-input)))
(add-hook 'Rnw-mode-hook
          '(lambda()
             (local-set-key [(shift return)] 'my-ess-eval)))
(require 'ess-site)





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