From the Emacs Eclim github page:

Install emacs-eclim. You have two options:

• Installation from the MELPA package archive.

  Just add the archive to package-archives if you haven't already, and

then install emacs-eclim with the package-install command.

• Manual installation from GitHub.

  (git clone git://github.com/senny/emacs-eclim.git)

  Add (add-to-list 'load-path "/path/to/emacs-eclim/") to your startup script.

If followed the first option and:

1. Added the following package-archives to my ~/.emacs.d/init.el file:

   (setq package-archives '(("gnu" . "http://elpa.gnu.org/packages/") ("marmalade" . "http://marmalade-repo.org/packages/") ("melpa" . "http://melpa.milkbox.net/packages/"))) 

2. Then typed M-xpackage-install and hit RET and the following message poped up:

Install package: emacs-eclim [No Match]

Why does this error pop up?

Thanks in advance.