title: Maven release plugin fails when creating tag
body: <p>I'm trying to use Maven release plugin 2.0 to tag the version and hopefully deploy the resulting jar to the repository.</p>
  
  <p>I got stuck at <code>release:prepare</code>, getting this cryptic error:</p>
  
  <pre><code>[INFO] Checking in modified POMs...
  [INFO] Executing: cmd.exe /X /C "svn --non-interactive commit --file C:\Users\ME~1\AppData\Local\Temp\maven-scm-950614965.commit --targets C:\Users\ME~1\AppData\Local\Temp\maven-scm-35306-targets"
  [INFO] Working directory: c:\workspace\release-test-trunk
  [INFO] Tagging release with the label release-test-1.3.0...
  [INFO] Executing: cmd.exe /X /C "svn --non-interactive copy --file C:\Users\ME~1\AppData\Local\Temp\maven-scm-829250416.commit --revision 1885 http://myserver/myproject/sandbox/release-test/trunk http://myserver/myproject/sandbox/release-test/tags/release-test-1.3.0"
  [INFO] Working directory: c:\workspace\release-test-trunk
  [INFO] ------------------------------------------------------------------------
  [ERROR] BUILD FAILURE
  [INFO] ------------------------------------------------------------------------
  [INFO] Unable to tag SCM
  Provider message:
  The svn tag command failed.
  Command output:
  svn: OPTIONS of 'http://myserver/myproject/sandbox/release-test': 200 OK (http://myserver)
  
  [INFO] ------------------------------------------------------------------------
  [INFO] For more information, run Maven with the -e switch
  [INFO] ------------------------------------------------------------------------
  [INFO] Total time: 20 seconds
  [INFO] Finished at: Tue Aug 24 19:31:55 GMT 2010
  [INFO] Final Memory: 14M/56M
  [INFO] ------------------------------------------------------------------------
  </code></pre>
  
  <ul>
  <li>The tag folder does exist and is empty</li>
  <li>I executed the command <code>mvn clean release:clean release:prepare</code> to be sure have a fresh run</li>
  <li>Every time I got the error I executed <code>mvn release:rollback</code> to have everything back to normal</li>
  <li>It doesn't seem to be a credentials problem, the pom file is effectively commited with the <code>-SNAPSHOT</code> removed and the scm information switched to the tag folder.</li>
  </ul>
  
  <p>The strange part is I don't understand how the pom file is commited since I did not specify any credentials neither in the pom nor in the settings.xml file located in maven local install</p>
  
  <p>I saw many people having a similar issue but with the <code>folder already exist</code> error message. Mine doesn't tell me what the error is precisely.</p>
  
  <p>Do you have any ideas ?</p>
  
  <p>Many thanks.</p>
  
  <p><strong>EDIT</strong>:
  @Colin
  If I browse svn://myserver/myproject/sandbox/release-test using tortoise svn for example it works fine. However if I type <a href="http://myserver/myproject/sandbox/release-test" rel="nofollow noreferrer">http://myserver/myproject/sandbox/release-test</a> in Firefox the page is not found.
  Also I think it should be ok since the pom file gets commited before trying to create the tag.
  My scm section in the pom file :</p>
  
  <pre><code>&lt;scm&gt;
      &lt;connection&gt;scm:svn:http://myserver/myproject/sandbox/release-test/tags/release-test-1.3.0&lt;/connection&gt;
      &lt;developerConnection&gt;scm:svn:http://myserver/myproject/sandbox/release-test/tags/release-test-1.3.0&lt;/developerConnection&gt;
      &lt;url&gt;http://myserver/myproject/sandbox/release-test/tags/release-test-1.3.0&lt;/url&gt;
  &lt;/scm&gt;
  </code></pre>
  
  <p>I tried removing the "http:" but that didn't work.</p>