Eclipse version:
Version: 3.1.0
Build id: I20050627-1435

Hibernate version:3.0.5

Hibernate tools version:3.1.0 Alpha 5


When Eclipse starts I get the following error:

An internal error occurred during: "loading http://hibernate.sourceforge.net/hibern ... on-3.0.dtd".

The error stack trace is:

java.lang.NoClassDefFoundError: org/eclipse/wst/common/uriresolver/internal/util/URIHelper
at org.eclipse.wst.dtd.core.internal.saxparser.DTDParser.parse(DTDParser.java:115)
at org.eclipse.wst.dtd.core.internal.emf.util.DTDUtil.parse(DTDUtil.java:102)
at org.eclipse.wst.dtd.core.internal.contentmodel.DTDImpl.buildDTDModel(DTDImpl.java:88)
at org.eclipse.wst.dtd.core.internal.contentmodel.DTDImpl.buildCMDocument(DTDImpl.java:79)
at org.eclipse.wst.dtd.core.internal.contentmodel.CMDocumentFactoryDTD.createCMDocument(CMDocumentFactoryDTD.java:37)
at org.eclipse.wst.xml.core.internal.contentmodel.ContentModelManager.createCMDocument(ContentModelManager.java:56)
at org.eclipse.wst.xml.core.internal.contentmodel.modelqueryimpl.CMDocumentManagerImpl.buildCMDocument(CMDocumentManagerImpl.java:277)
at org.eclipse.wst.xml.core.internal.contentmodel.modelqueryimpl.CMDocumentManagerImpl$AsyncBuildOperation.run(CMDocumentManagerImpl.java:262)
at org.eclipse.wst.xml.core.internal.contentmodel.modelqueryimpl.CMDocumentManagerImpl$1.run(CMDocumentManagerImpl.java:228)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:76)


Where can I find the missing class?

eclipse.org/webtools

download wtp project (and dependencies emf,gef and jem)