Eclipse Helios cannot disable plugin

Question

I have eclipse Helios for Java EE and I downloaded all the pluggins related to the Modeling Framework. After that, all aspects of Java EE are lost! In any case, it is not possible to remove the plugins or return to the previous installation.
If I select the plugin and click "Uninstall", I will get:

When deleting, the session context was: (profile = epp.package.jee, phase = org.eclipse.equinox.internal.p2.engine.phases.Uninstall, operand = [R] org.eclipse.acceleo.common.source 3.0.1 .v201009150438 → null, action = org.eclipse.equinox.internal.p2.touchpoint.eclipse.actions.RemoveSourceBundleAction). org / eclipse / equinox / internal / simpleconfigurator / Utils / SimpleConfiguratorUtils org / eclipse / equinox / internal / simpleconfigurator / Utils / SimpleConfiguratorUtils

If I chose installation yesterday and click revert, I get:

When deleting, the session context was: (profile = epp.package.jee, phase = org.eclipse.equinox.internal.p2.engine.phases.Uninstall, operand = [R] com.google.collect 0.8.0.v201008251220 → null , action = org.eclipse.equinox.internal.p2.touchpoint.eclipse.actions.UninstallBundleAction). org / eclipse / equinox / internal / simpleconfigurator / Utils / SimpleConfiguratorUtils org / eclipse / equinox / internal / simpleconfigurator / Utils / SimpleConfiguratorUtils

Why can't I use unistall? Is this some kind of problem in Helios ??

Answer 1

I assume you followed:

Help=> About Eclipse=> Installation Detail=> Installed Software Tab=>, and then select the product to remove - from the exception that was Acceleo => Uninstall....

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