BIRT报告org.eclipse.birt.report.service.api.ReportServiceException：运行报告时发生错误

Question

我正面临以下问题，并且正在使用BIRT报告和tomcat 7服务器

org.eclipse.birt.report.service.api.ReportServiceException: Error happened while running the report.

Caused by: org.eclipse.birt.report.engine.api.EngineException: Error happened while running the report.
   at org.eclipse.birt.report.engine.api.impl.RenderTask.render(RenderTask.java:308)
   at org.eclipse.birt.report.service.ReportEngineService.renderReport(ReportEngineService.java:1545)
... 54 more
Caused by: java.lang.NoClassDefFoundError: org/eclipse/birt/report/engine/api/script/IReportContext