Error happened while running report.

Hi

    At the Creation of ObjectDB Data Set step.The parameter setting finished,the problem occurred at preview result time.

Like:

   org.eclipse.birt.report.engine.api.EngineException: Error happened while running the report.
    at org.eclipse.birt.report.engine.api.impl.DatasetPreviewTask.doRun(DatasetPreviewTask.java:330)
    at org.eclipse.birt.report.engine.api.impl.DatasetPreviewTask.runDataset(DatasetPreviewTask.java:280)
    at org.eclipse.birt.report.engine.api.impl.DatasetPreviewTask.execute(DatasetPreviewTask.java:91)
    at org.eclipse.birt.report.designer.data.ui.dataset.DataSetPreviewer.preview(DataSetPreviewer.java:68)
    at org.eclipse.birt.report.designer.data.ui.dataset.ResultSetPreviewPage$5.run(ResultSetPreviewPage.java:366)
    at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:119)
Caused by: java.lang.NoClassDefFoundError: org/mozilla/javascript/ScriptOrFnNode
    at org.eclipse.birt.data.engine.impl.PreparedQuery.<init>(PreparedQuery.java:100)
    at org.eclipse.birt.data.engine.impl.PreparedDataSourceQuery.<init>(PreparedDataSourceQuery.java:75)
    at org.eclipse.birt.data.engine.impl.PreparedOdaDSQuery.<init>(PreparedOdaDSQuery.java:76)
    at org.eclipse.birt.data.engine.impl.PreparedQueryUtil.newInstance(PreparedQueryUtil.java:211)
    at org.eclipse.birt.data.engine.impl.DataEngineImpl.prepare(DataEngineImpl.java:426)
    at org.eclipse.birt.report.data.adapter.impl.DataRequestSessionImpl.prepare(DataRequestSessionImpl.java:473)
    at org.eclipse.birt.report.data.adapter.impl.DataRequestSessionImpl.prepare(DataRequestSessionImpl.java:483)
    at org.eclipse.birt.report.engine.api.impl.DatasetPreviewTask.extractQuery(DatasetPreviewTask.java:348)
    at org.eclipse.birt.report.engine.api.impl.DatasetPreviewTask.doRun(DatasetPreviewTask.java:309)
    ... 5 more
Caused by: java.lang.ClassNotFoundException: org.mozilla.javascript.ScriptOrFnNode cannot be found by org.eclipse.birt.data_4.4.2.v201501161327
    at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:439)
    at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:352)
    at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:344)
    at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:160)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    ... 14 more

how can i solve this problem. Problem attachment also given below.

The stack trace doesn't mention ObjectDB.

It seems as a BIRT installation issue (a missing class).