i calling excel such JRXlsExporter exporterXLS = new JRXlsExporter(); exporterXLS.setParameter(JRXlsExporterParameter.JASPER_PRINT, jasperPrint); exporterXLS.setParameter(JRXlsExporterParameter.IS_DETECT_CELL_TYPE, Boolean.TRUE); exporterXLS.setParameter(JRXlsExporterParameter.IS_WHITE_PAGE_BACKGROUND, Boolean.FALSE); exporterXLS.setParameter(JRXlsExporterParameter.OUTPUT_STREAM, OutputStream); exporterXLS.exportReport(); from poi libs i have those poi-scratchpad-3.6-20091214.jar poi-ooxml-3.6-20091214.jar poi-3.6-20091214.jar poi-examples-3.6-20091214.jar poi-contrib-3.6-20091214.jar poi-ooxml-schemas-3.6-20091214.jar jakarta-poi-2.5.jar poi-3.0-alpha3-20061212.jar when i compiling, getting error: com.sun.rave.web.ui.appbase.ApplicationException: javax.servlet.ServletException: org.apache.poi.hssf.usermodel.HSSFSheet.setColumnWidth(II)V what i can to to output excel normally and not to get this error?