Proxy settings can prevent the update mechanism from reaching the locations you want/need. The Update Manager is invoked by Help => Software Updates. Remember to have an ‘open’ connection to the internet when updating. The feature itself has to be published using an update site. The Update Manager allows you to find new plug-ins on your machine, your network, or the Internet, compare new plug-ins to your configuration, and install only those that are compatible with your current configuration. The Update Manager thinks in terms of features, a logical group of related plug-ins, and also provides support for managing configurations to undo a given installation or to automatically update all the features currently installed in your Eclipse configuration. Before plug-ins can be installed by the Update Manager, they need to be collected into a feature. Start Eclipse with “Run as administrator…”. Upgrades may require administrator privileges to succeed and may fail with error messages claiming “Only one of the following can be installed:” otherwise. Download a new build from the Eclipse download Web site Eclipse Download and unzip it in a new directory. Complete upgrade instructions are always included in the Eclipse readme_eclipse.html file included with every build in the readme directory. In these cases you will need to download a fresh install. Occasionally you won’t be able to upgrade Eclipse or certain features due to incompatible changes in the update technology. The Eclipse Project Updates URL changes with each release (typically release-specific sites hold the SDK/Source features and off-cycle hot fixes and are not required) A restart may not be required when updating other features, but always select to restart if you are unsure. Check your Available Software Sites for release-specific update sites that may need updating as well, e.g. Here you can choose the items which you want to update. If upgrading the platform itself, when you are prompted to restart it is strongly recommended to do so.
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