I'm trying to install Subclipse in SpringSource Tool Suite (version 2.8.1.RELEASE). Following the instructions at http://www.dariopardo.com/dev-env/how-to-integrate-sts-or-eclipse-with-subversion-svn/, I go to Help->Install New Software. I enter the site http://subclipse.tigris.org/update_1.6.x in the Work with text field. Then I get to choose from "Core SVNKit Library", "Optional JNA Library", and "Subclipse".
No matter what components I select, I get the error message "Cannot complete the install because one or more required items could not be found." after clicking Next. I have no problem with my internet connection.
I got the same error message when trying to install Subclipse from a locally stored site-1.0.6.zip file (downloaded from http://subclipse.tigris.org/servlets/ProjectDocumentList?folderID=2240) instead of the above URL.
There seems to be no STS documentation on this. Help, please!