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Unresolved compilation problems: The import org.apache.poi cannot be resolved The import org.apache.poi cannot be resolved The import org.apache.poi cannot be resolved The import org.apache.poi cannot be resolved The import org.apache.poi cannot be resolved The import org.apache.poi cannot be resolved The import org.apache.poi cannot be resolved
java.lang.Error: Unresolved compilation problems: 
 The import org.apache.poi cannot be resolved
 The import org.apache.poi cannot be resolved
 The import org.apache.poi cannot be resolved
 The import org.apache.poi cannot be resolved
 The import org.apache.poi cannot be resolved
 The import org.apache.poi cannot be resolved
 The import org.apache.poi cannot be resolved	at org.uguess.birt.report.engine.emitter.xls.XlsRenderer.(XlsRenderer.java:88)	at org.uguess.birt.report.engine.emitter.xls.XlsRenderer2.(XlsRenderer2.java:53)	at org.uguess.birt.report.engine.emitter.xls.XlsEmitter.initialize(XlsEmitter.java:100)	at org.eclipse.birt.report.engine.nLayout.LayoutEngine.initialize(LayoutEngine.java:140)	at org.eclipse.birt.report.engine.api.impl.EngineTask.initializeContentEmitter(EngineTask.java:2205)	at org.eclipse.birt.report.engine.api.impl.RunAndRenderTask.doRun(RunAndRenderTask.java:117)	at org.eclipse.birt.report.engine.api.impl.RunAndRenderTask.run(RunAndRenderTask.java:77)	at at.hallermobil.report.engine.BirtEngine.generateReport(BirtEngine.java:101)	at at.hallermobil.report.servlets.ReportServlet.doPost(ReportServlet.java:70)	at at.hallermobil.report.servlets.ReportServlet.doGet(ReportServlet.java:33)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:734)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)	at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1539)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)	at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)	at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:98)	at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:91)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:162)	at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:330)	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)	at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:174)	at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:828)	at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:725)	at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1019)	at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:225)	at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)	at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)	at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)	at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)	at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)	at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)	at com.sun.grizzly.ContextTask.run(ContextTask.java:71)	at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)	at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)	at java.lang.Thread.run(Thread.java:722)