Also tried with the nightly build same result. (Version: 3.1.0.v200910310441N-H45-RC1) The previous entry in the Eclipse error log is also related: java.lang.NullPointerException: No IModelProvider exists for project P/ref of version: Dynamic Web Module 2.5 at org.eclipse.jst.j2ee.model.ModelProviderManager.getModelProvider(ModelProviderManager.java:99) at org.eclipse.jst.j2ee.web.project.facet.WebFacetInstallDelegate.createWeb25DeploymentDescriptor(WebFacetInstallDelegate.java:283) at org.eclipse.jst.j2ee.web.project.facet.WebFacetInstallDelegate.execute(WebFacetInstallDelegate.java:116) at org.eclipse.wst.common.project.facet.core.internal.FacetedProject.callDelegate(FacetedProject.java:1467) at org.eclipse.wst.common.project.facet.core.internal.FacetedProject.modifyInternal(FacetedProject.java:438) at org.eclipse.wst.common.project.facet.core.internal.FacetedProject.mergeChangesInternal(FacetedProject.java:1171) at org.eclipse.wst.common.project.facet.core.internal.FacetedProject.access$2(FacetedProject.java:1107) at org.eclipse.wst.common.project.facet.core.internal.FacetedProject$5.run(FacetedProject.java:1089) at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:1800) at org.eclipse.wst.common.project.facet.core.internal.FacetedProject.mergeChanges(FacetedProject.java:1099) at org.eclipse.wst.common.project.facet.core.internal.FacetedProjectWorkingCopy.commitChanges(FacetedProjectWorkingCopy.java:1958) at org.eclipse.wst.common.project.facet.ui.ModifyFacetedProjectWizard.performFinish(ModifyFacetedProjectWizard.java:400) at org.eclipse.wst.web.ui.internal.wizards.NewProjectDataModelFacetWizard.performFinish(NewProjectDataModelFacetWizard.java:279) at org.jboss.tools.seam.ui.wizard.SeamProjectWizard.performFinish(SeamProjectWizard.java:278) at org.eclipse.wst.common.project.facet.ui.ModifyFacetedProjectWizard$3.run(ModifyFacetedProjectWizard.java:331) at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:1800) at org.eclipse.wst.common.project.facet.ui.ModifyFacetedProjectWizard$4.run(ModifyFacetedProjectWizard.java:345) at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121) View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4263340#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...