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POGWT/ Eclipse: ClassNotFoundException com/google/gwt/dev/Compiler
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  1. POGWT/ Eclipse: ClassNotFoundException com/google/gwt/dev/Compiler
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    copied!<p>i recently updated from GWT 2.0.4 to 2.1.0. Since then I cannot compile my GWT application anymore. When I click on the GWT compile button of the GWT eclipse plugin I get the following error: </p> <pre><code>java.lang.NoClassDefFoundError: com/google/gwt/dev/Compiler Caused by: java.lang.ClassNotFoundException: com.google.gwt.dev.Compiler at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:307) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:248) Exception in thread "main" </code></pre> <p>Also I can't create a new GWT project in Eclipse. In the new New Web Application Project Dialog one can choose to use GWT and/or Google App Engine. When check "Use GWT" a error dialog raises up which says: "Creation of element failed. Reason: Invocation of com.google.gwt.user.tools.WebAppCreator failed. See the error log for more details."</p> <p>In the log file (<code>&lt;workspace&gt;/.metadata/.log</code>) I can see the message: </p> <pre><code>!ENTRY org.eclipse.jdt.ui 4 10001 2010-11-02 08:34:50.085 !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:532) at com.google.gdt.eclipse.suite.wizards.WebAppProjectCreator.create(WebAppProjectCreator.java:294) at com.google.gdt.eclipse.suite.wizards.NewWebAppProjectWizard.finishPage(NewWebAppProjectWizard.java:147) 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 2010-11-02 08:34:50.085 !MESSAGE Invocation of com.google.gwt.user.tools.WebAppCreator failed. See the error log for more details. </code></pre> <p>gwt-dev.jar, gwt-user.jar and many other google-jars are in the classpath...</p> <p>Does anyone have an idea how to solve this issue? I also set up a new fresh Eclipse installation, installed the new GWT plugin, and chose a new workspace directory, but this still gives me the errors...</p> <p>Additional information: </p> <ul> <li>Windows XP, </li> <li>Eclipse for Java EE 3.6 Helios, </li> <li>J2EE / Java 1.6.0_22-b04</li> <li>Google Plugin for Eclipse 3.6 1.4.0.v201010280102,</li> <li>Google App Engine Java SDK 1.3.8 1.3.8.v201010161055 </li> <li>Google Web Toolkit SDK 2.1.0 2.1.0.v201010280102</li> </ul>
 

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