FAQ Why does my update site need a license?
When installing a feature using the Update Manager, you may run into a cryptic message that this feature will invalidate the current configuration. When you click Details..., the reason is indicated: A license agreement is missing for the feature. A feature must have a license before it can be shared with others on an update site.
For each feature published through your update site, edit the feature.xml file and enter a license agreement. Then, in the site.xml editor, click Build All again to rebuild the features.
This FAQ was originally published in Official Eclipse 3.0 FAQs. Copyright 2004, Pearson Education, Inc. All rights reserved. This text is made available here under the terms of the Eclipse Public License v1.0.