Everywhere I go on google I get the same answer to this problem but it is the wrong answer for me. Originally I installed Subversion 1.5.6 for windows (i run Windows Server 2008) on my server and i made a repository for a project. Then I used a Tortoise client version 1.6.X on my laptop to update the project. Everything was hunky-dory until I tried to use a post-commit hook script (i am updating folders in wwwroot on commit to reflect changes on a web page). I got a message to the effect of "This client is too old to work with working copy 'XXX'".
So I uninstalled the SVN client on my laptop and removed the repository from the server. I then made a new repository on the server from scratch and installed TortoiseSVN version 1.5.6 thinking if the client version is the same as the Subversion on the server then they should play nice. After i downloaded the repository on my laptop again and reinstalled my hook script I get the same message...
It is quite painstaking and disruptive to have to keep obliterating my repositories and reinstalling my client to find ones that co-operate through trial and error. I see no reason (and can find none online) as to why the repository would argue if both TortoiseSVN and my server Subversion are both 1.5.6.
Is there anyone out there that can give some insight as to why I would be getting this message? Perhaps even someone who could let me know what version of TortoiseSVN I need to use in order for my Server SVN 1.5.6 to not complain. My hook script works from the command line on my server so I know it's not it's fault. Thanks in advance.
It turns out my server version of SVN was 1.5.6, but the TortoiseSVN client I had installed on the server was version 1.6.3. When I would checkout my wwwroot working copy (or update it using the right click options TortoiseSVN gave me) and updated that working copy's version, the SVN server couldn't update it because it was a lower version.
I downloaded TortoiseSVN 1.5.6 from file hippo and re-checked out the working copy on the server and it all worked great!
You claim that the cause of your problem is not the post-commit hook script but my hunch is that that is exactly the root of your problems. When your post-commit script runs, how does it get the files out of your Subversion server so that it can copy them to your web server? Does it not check them out? Besides, you say that everything was working fine until you installed the post-commit hook script.
I have worked in mixed-mode client/server SVN installation situations before, including TortoiseSVN as a client and I have never come across any incompatibilities as long as the clients that work on the same repository are the same version.
Could you please post the contents of your post-commit hook so we can elaborate further?
In my case I moved eclipse code from one place to another then the problem started. For solving I checkout the project form the svn repo. Then in old project I cleaned all svn files. (simply search .svn and delete ) then I copy the content to the just checked out project, my changes became visible and my project is up to date. This method can be applied for other annoying errors. Hope this help someone
If you go from 1.6 down to 1.5 you could need to downgrade. You never tell us how you move your repository but you must depending on how you do that get a version of the repository itself.
http://wiki.open.collab.net/wiki/Subversion_Client_FAQ#head-ed7f8e6b7f3265c74eaf7d49dcd4aab85bae2a12
Check to see what svn command your post-commit hook script is running. Check that the version of this command matches the version of the last SVN client to touch your repository.
By default when using a new version of a subversion client it will upgrade the repository to that version. This means that suddenly older clients just stop working.
I had the same error. But the cause was I checked out the project with a svn 1.5 client and my subclipse plugin in eclipse was version 1.4. So updating my subclipse plugin to 1.6 version did the trick. so the problem was subclipse 1.4 does not work with projects that were checked out with svn 1.5 client.
Hope this helps someone.
来源：https://stackoverflow.com/questions/1296512/this-client-is-too-old-to-work-with-working-copy