Initial TDS Installation THREDDS Data Server

Catalog Service Request - Catalog Has Fatal Error

Catalog [http://opendap.nmdc.eu/knmi/thredds/catalog.xml] has fatal errors:

  ----Catalog Validation
**Fatal:  InvCatalogFactory.readXML failed
 Exception= java.net.UnknownHostException opendap.nmdc.eu
 fatalMessages= 
 errMessages= 
 warnMessages=