error while downloading the android source code

```
hi
i m following the below link to get the source code of android
http://code.google.com/p/rowboat/wiki/Source
but in the middle of downloading i got the below error
---------------------------------------------------------------------------
File "/root/rowboat/.repo/repo/main.py", line 238, in
_Main(sys.argv[1:])
File "/root/rowboat/.repo/repo/main.py", line 220, in _Main
repo._Run(argv)
File "/root/rowboat/.repo/repo/main.py", line 125, in _Run
cmd.Execute(copts, cargs)
File "/root/rowboat/.repo/repo/subcmds/sync.py", line 360, in Execute
project.Sync_LocalHalf(syncbuf)
File "/root/rowboat/.repo/repo/project.py", line 688, in Sync_LocalHalf
head = self.work_git.GetHead()
File "/root/rowboat/.repo/repo/project.py", line 1380, in GetHead
fd = open(path, 'rb')
IOError: [Errno 2] No such file or directory:
u'/root/rowboat/system/core/.git/HEAD'
-------------------------------------------------------------------------------
how to fix this problm?

```

Original issue reported on code.google.com by `nieki...@gmail.com` on 4 Mar 2011 at 7:18

Start with the linked Source instructions and the traceback locations in .repo/repo/subcmds/sync.py and .repo/repo/project.py, especially the missing system/core/.git/HEAD path. Reproduce the download failure and determine whether the issue is a checkout or sync problem; the work is complete only when the cause and a verified recovery or code change are clearly established.

Written by the indexing model from the issue text.