Post-commit hook fails in Visual SVN Server

Question

I have added a post-commit hook to my Visual SVN Server that updates my web root folder. I have the following in the commit-hook:

"%VISUALSVN_SERVER%bin\svn.exe" update "D:\wamp\www\xix" --username xone --password xxx

Running this from within the command-line works, but when I commit changes in my project from the client program, I get always the error:

Error: post-commit hook failed (exit code 1) with output: svn: E720005: Error resolving case of 'D:\wamp\www\xix'

Why is this? Thanks for your help!

Is D: a mapped network drive? Network drives are mapped on per-user basis and are not accessible by service accounts. VisualSVN Server runs under NETWORK SERVICE account, by default. — bahrep
Also, check that you are running the client program with Administrator-level privileges. — Sameer Singh
@SameerSingh you are wrong, it does not matter in this case at all. — bahrep
Hmmm I've had funnies with this when the client wasn't running as Admin, but I think you're right. Sorry! — Sameer Singh

David W. David W. · Accepted Answer · 2013-08-06T15:43:45

Several things:

The post-commit hook has no access to your client's workspace.
When you run the command from the command line, you're a different user than the user the server running the command. The error number E720005 usually points to a user who doesn't have permission to update a file inside their working directory. That user may have permission to read from the repository, but not necessarily to write to the working directory.
Many environment variables are purposefully munged when the hook is executed. It could be that your environment variables like %VISUALSVN_SERVER% are not what you think they are.