我试图在我的Macvim上安装Vundle。我遵循以下link获得Vundle。我还配置了我的.vimrc文件。但是当我尝试PluginInstall时，出现以下错误。Vim错误E492 - 不是编辑器命令：PluginInstall

E492: Not an editor command: PluginInstall

我的.vimrc包含以下内容：

1 set nocompatible "https://stackoverflow.com/questions/5845557/in-a-vimrc-is-set-nocc

ompatible-completely-useless

2

3 " https://github.com/gmarik/Vundle.vim

4 filetype off " required

5

6 " set the runtime path to include Vundle and initialize

7 set rtp+=~/.vim/bundle/Vundle.vim

8 call vundle#begin()

9 " alternatively, pass a path where Vundle should install plugins

10 "call vundle#begin('~/some/path/here')

11

12 " let Vundle manage Vundle, required

13 Plugin 'gmarik/Vundle.vim'

14

15 " All of your Plugins must be added before the following line

16 call vundle#end() " required

17 filetype plugin indent on " required

我的VIM目录：

Username-MacBook-Pro:bundle u1$ pwd

/Users/u1/.vim/bundle

Username-MacBook-Pro:bundle u1$ ls

Vundle.vim

我还检查this计算器岗位。但它并没有解决我的问题。它为什么会抛出这样的错误，我怎么才能找到我的问题究竟是什么。