I add the "http://caucho.com/m2" or "http://caucho.com/m2-snapshot" repository address but is error .Message is
Unable to update index for caucho release repository|http://caucho.com/m2: Resource nexus-maven-repository-index.properties does not exist
Where is the new address?
The Caucho repository does NOT provide a Nexus index and you can't search it with m2eclipse, that's all. But this doesn't mean the repository doesn't work.