Eclipse Kepler and Vaadin plugin not working - Implementation of project fa

HI Guys,

I have the following problem on Fedora Core 20. I have installed Eclipse Kepler and via Eclipse marketplace the vaadin plugin. All looks fine but I have this warning: Implementation of project facet com.vaadin.integration.eclipse.core could not be found. Functionality will be limited.

Any hints?

Thank you!

It looks like after starting eclipse with -clean option and installing Apache Ivy now I have the option to export vaadin addons…

Still searching to find out why it happened.