Composer既不安装也不更新RecursiveDirectoryIterator无法找到指定的路径

我一直在尝试使用我的windows7 64位机器上的composer更新/安装.但最近我收到了这个错误:

$ php composer.phar install
Loading composer repositories with package information
Installing dependencies (including require-dev)
  - Installing zendframework/zendxml (dev-master 559b34f)
    Cloning 559b34f426d33a11c3db118e00ce14bb8dc64e5f
Failed to download zendframework/zendxml from source: RecursiveDirectoryIterator
::__construct(C:\wamp\www\projects\vendor\zendframework\zendxml,C:\wamp\www\projects\vendor\zendframework\zendxml): The system cannot find the path specified. (
code: 3)
Now trying to download from dist
  - Installing zendframework/zendxml (dev-master 559b34f)
    Downloading: 100%



  [UnexpectedValueException]
  RecursiveDirectoryIterator::__construct(C:\wamp\www\projects\vendor/zendfra
  mework/zendxml,C:\wamp\www\projects\vendor/zendframework/zendxml): The syst
  em cannot find the path specified. (code: 3)

我试图删除供应商目录以及清空作曲家缓存,但这并没有解决问题.

有什么建议？