package-initialize: wrong type argument : arrayp , nil

while going through the emacs as a c/c++ editor , I came across the following lines of code to include in my ~/.emacs file, to connect to melpa archives for package installation (require 'package) (add-to-list 'package-archives '("melpa" . "http://melpa.milkbox.net/packages/")) (package-initialize) after saving these lines into emacs , when i started emacs it is showing me an wrong type argument:

[ryskosn]

"wrong-type-argument arrayp nil" というエラーの対処法。package の archive ファイルを削除して入れなおすと直った。

[kuenishi]

Worked for me