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Created attachment 168749 [details] eclipse error scrren shot While launching eclipse i m getting followin error java.lang.AbstractMethodError: org.apache.xerces.dom.DocumentImpl.getXmlStandalone()Z at com.sun.org.apache.xalan.internal.xsltc.trax.DOM2TO.setDocumentInfo(Unknown Source) at com.sun.org.apache.xalan.internal.xsltc.trax.DOM2TO.parse(Unknown Source) at com.sun.org.apache.xalan.internal.xsltc.trax.DOM2TO.parse(Unknown Source) at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transformIdentity(Unknown Source) at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(Unknown Source) at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(Unknown Source) at org.eclipse.mylyn.internal.tasks.ui.util.TaskListWriter.writeDOMtoStream(TaskListWriter.java:236) at org.eclipse.mylyn.internal.tasks.ui.util.TaskListWriter.writeTaskList(TaskListWriter.java:207) at org.eclipse.mylyn.internal.tasks.ui.util.TaskListWriter.writeTaskList(TaskListWriter.java:193) at org.eclipse.mylyn.internal.tasks.ui.util.TaskListWriter.writeTaskList(TaskListWriter.java:127) at org.eclipse.mylyn.internal.tasks.ui.util.TaskListSaveManager.internalSaveTaskList(TaskListSaveManager.java:127) at org.eclipse.mylyn.internal.tasks.ui.util.TaskListSaveManager.access$0(TaskListSaveManager.java:125) at org.eclipse.mylyn.internal.tasks.ui.util.TaskListSaveManager$TaskListSaverJob.run(TaskListSaveManager.java:272) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)
That looks like a problem with your classpath installation. Please check that there is no conflicting version of Xerces on your Java classpath.