svn: Working copy path 'some/file.c' does not exist in repository

[Loo Hoe CHAN - Singapore <LH...@sapl.samsung.com>]

Hi,

i've been using Subversion for a couple of months, mostly checking in.
Now, I'm stuck when i tried to use Branch and Switch.

when i run "svn up", i get the this message:
 svn: Working copy path 'some/file.c' does not exist in repository

when i run "svn list -v file:///path/to/repos/trunk/some",
"file.c" is right there in the repository.  it is also in the
working copy.

i also tried "svn cleanup", but nothing happens.

Now i must admit that the wc is in a state of uncompleted
commit/switch, something.  It happened a few weeks ago, after i've 
created a branch and then i was switching back and forth between the
trunk and the branch.
i've been searching for more info about this error message,
but nothing.

i was using TortoiseSVN (1.1.0, Build 1769) all along, when
the problem happened.
Now i have switched to using svn directly.
svn, version 1.1.3 (r12730)
   compiled Jan 20 2005, 05:51:34

Copyright (C) 2000-2004 CollabNet.

i guess i could chug out the current wc, and check out the
trunk and branch again, but i just like to know what i did wrong
when using "svn switch"

Thanks in advance.

LH