Vimrc sachet and error message

.vimrc

set nocompatible

" Pathogen
call pathogen#infect()
call pathogen#helptags()
 
set statusline=%<\ %n:%f\ %m%r%y%=%-35.(line:\ %l\ of\ %L,\ col:\ %c%V\ (%P)%)
filetype plugin indent on
 
syntax on
set number
set hlsearch
set showmatch
set incsearch
set ignorecase
set nowrap
set autoindent
set history=1000
set cursorline
set expandtab
set shiftwidth=4
set tabstop=4
set softtabstop=4

" Nerdtree
autocmd vimenter * NERDTree
let NERDTreeShowBookmarks=1
let NERDTreeChDirMode=0
let NERDTreeQuitOnOpen=1
let NERDTreeMouseMode=2
let NERDTreeShowHidden=1
let NERDTreeIgnore=['\.pyc','\~$','\.swo$','\.swp$','\.git','\.hg','\.svn','\.bzr']
let NERDTreeKeepTreeInNewTab=1
let g:nerdtree_tabs_open_on_gui_startup=0
 

colorscheme Tomorrow-Night

error

$ vim 
Error detected while processing /Users/cnu/.vimrc:
line    4:
E117: Unknown function: pathogen#infect
line    5:
E117: Unknown function: pathogen#helptags
line   37:
E185: Cannot find color scheme Tomorrow-Night
Press ENTER or type command to continue




Error detected while processing VimEnter Auto commands for "*":
E492: Not an editor command: NERDTree
Press ENTER or type command to continue