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inf : http://stackoverflow.com/questions/5136898/checkout-svn-svnssh-repo-with-subversive-in-eclipse-helios

SVN: '0x00400006: Validate Repository Location' operation finished with error: Selected SVN connector library is not available or cannot be loaded.
If you selected native JavaHL connector, please check if binaries are available or install and select pure Java Subversion connector from the plug-in connectors update site.
If connectors already installed then you can change the selected one at: Window->Preferences->Team->SVN->SVN Connector.
Selected SVN connector library is not available or cannot be loaded.
If you selected native JavaHL connector, please check if binaries are available or install and select pure Java Subversion connector from the plug-in connectors update site.
If connectors already installed then you can change the selected one at: Window->Preferences->Team->SVN->SVN Connector.

• Go to Help > Install New Software...
• Paste in the URL http://community.polarion.com/projects/subversive/download/eclipse/2.0/update-site/
• Select the connector you wish to install (I usually go with SVNKit). You need to select both the wanted connector and the generic "Subversive SVN Connectors" item.
• Click Finish

You should be able to use your repository now, but if not :

• Go to Window > Preferences
• Browse to the Team > SVN item
• In the SVN Connector tab, make sure that SVNKit is selected as the active one.

For eclipse juno you have to replace word "updated" to "juno". So working link for eclipse juno is:http://community.polarion.com/projects/subversive/download/eclipse/3.0/juno-site/

for eclipse kepler you can use this

http://community.polarion.com/projects/subversive/download/eclipse/3.0/kepler-site/