Subversion Exception! line 647: assertion failed (peg_revnum != SVN_INVALID_REVNUM)

the following error received:

---------------------------
Subversion Exception!
---------------------------
Subversion encountered a serious problem.
Please take the time to report this on the Subversion mailing list
with as much information as possible about what
you were trying to do.
But please first search the mailing list archives for the error message
to avoid reporting the same problem repeatedly.
You can find the mailing list archives at
http://subversion.apache.org/mailing-lists.html

Subversion reported the following
(you can copy the content of this dialog
to the clipboard using Ctrl-C):

In file
 'D:\Development\SVN\Releases\TortoiseSVN-1.8.0\ext\subversion\subversion\libsvn_client\ra.c'
 line 647: assertion failed (peg_revnum != SVN_INVALID_REVNUM)
---------------------------
OK
---------------------------

was using tortoise svn 1.7
Installed Visual SVN client for dotnet
Visual SVN installation advised for 1.8 upgrate.
Downloaded and installed the same.
Henceforth not able to perform SVN operation!!!!

No Commit, No Update,, nothing

Tried going back to 1.7, but it is telling project is in higher version :((

how to use now, my development is getting affected!!!
Received on 2013-06-21 06:18:40 CEST