Installing Plugins In Eclipse on Ubuntu 10.04

You get this when installing a plugin to Eclipse on Ubuntu 10.04:

An error occurred while installing the items session context was (profile=PlatformProfile, phase=org.eclipse.equinox.internal.provisional.p2.engine.phases.Install, operand=null --> [R]org.eclipse.cvs 1.0.400.v201002111343,  action=org.eclipse.equinox.internal.p2.touchpoint.eclipse.actions.InstallBundleAction).

  The artifact file for osgi.bundle,org.eclipse.cvs,1.0.400.v201002111343 was not found.

We got this when installing the Aptana Studio plugin. The fix is to install PDE. On the command line run this:

sudo apt-get install eclipse-pde