problem starting project in google web toolkit eclipse plugin

am new to the google webtoolkit for eclipse. After successivefully installing the GWT plugin for eclipse and start my first project i got an error "invocati开发者_开发问答on of com.google.gwt.user.tools.WebAppCreator failed, See the error log for more details". Anyone who knows the solution can help. thanks.

Here is the error log;

!ENTRY org.eclipse.jdt.ui 4 10001 2011-03-08 11:47:54.258
!MESSAGE Internal Error
!STACK 1
Java Model Exception: Core Exception [code 0] Invocation of com.google.gwt.user.tools.WebAppCreator failed. See the error log for more details.
    at org.eclipse.jdt.internal.core.BatchOperation.executeOperation(BatchOperation.java:50)
    at org.eclipse.jdt.internal.core.JavaModelOperation.run(JavaModelOperation.java:728)
    at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:1975)
    at org.eclipse.jdt.core.JavaCore.run(JavaCore.java:4777)
    at org.eclipse.jdt.internal.ui.actions.WorkbenchRunnableAdapter.run(WorkbenchRunnableAdapter.java:106)
    at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)
Caused by: org.eclipse.core.runtime.CoreException: Invocation of com.google.gwt.user.tools.WebAppCreator failed. See the error log for more details.
    at com.google.gwt.eclipse.core.runtime.tools.WebAppProjectCreatorRunner.createProject(WebAppProjectCreatorRunner.java:53)
    at com.google.gdt.eclipse.suite.wizards.WebAppProjectCreator.createGWTProject(WebAppProjectCreator.java:549)
    at com.google.gdt.eclipse.suite.wizards.WebAppProjectCreator.create(WebAppProjectCreator.java:297)
    at com.google.gdt.eclipse.suite.wizards.NewWebAppProjectWizard.finishPage(NewWebAppProjectWizard.java:151)
    at org.eclipse.jdt.internal.ui.wizards.NewElementWizard$2.run(NewElementWizard.java:117)
    at org.eclipse.jdt.internal.core.BatchOperation.executeOperation(BatchOperation.java:39)
    at org.eclipse.jdt.internal.core.JavaModelOperation.run(JavaModelOperation.java:728)
    at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:1975)
    at org.eclipse.jdt.core.JavaCore.run(JavaCore.java:4777)
    at org.eclipse.jdt.internal.ui.actions.WorkbenchRunnableAdapter.run(WorkbenchRunnableAdapter.java:106)
    at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)
!SUBENTRY 1 com.google.gwt.eclipse.core 4 0 2011-03-08 11:47:54.259
!MESSAGE Invocation of com.google.gwt.user.tools.WebAppCreator failed. See the error log for more details.

I resolved this by changing workspace. Permissions on the old workspace directory were fine, I still dunno what was wrong with it.

Unchecking the "Generate project sample code" checkbox on the "New web Application Project" window solved the problem for me.

Delete the metadata folder from you existing work space and restart eclipse. It is a hidden folder for me OS=Ubuntu-12.04. Ctrl+h to show.

Have you configured GWT SDK in your project?

Deselecting "Use Google Web Toolkit" is the solution for me. May be my google web toolkit (GWT) installation has some problems.

I followed the following steps to get this resolved: 1. go to control panel > Advanced System Settings > Environment Variables 2. Remove classpath from both user variables as well as from the system variables.

I hope this works.

I fixed this by unchecking "Generate project sample code" checkbox on the "New web Application Project" window