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java.lang.IllegalArgumentException: name. SEVERE: java.lang.IllegalArgumentException: name	at sun.misc.URLClassPath$Loader.findResource(URLClassPath.java:460)	at sun.misc.URLClassPath.findResource(URLClassPath.java:146)	at java.net.URLClassLoader$2.run(URLClassLoader.java:385)	at java.security.AccessController.doPrivileged(Native Method)	at java.net.URLClassLoader.findResource(URLClassLoader.java:382)	at java.lang.ClassLoader.getResource(ClassLoader.java:1003)	at java.lang.ClassLoader.getResource(ClassLoader.java:998)	at com.sun.enterprise.v3.server.APIClassLoaderServiceImpl$APIClassLoader.getResource(APIClassLoaderServiceImpl.java:205)	at java.lang.ClassLoader.getResource(ClassLoader.java:998)	at java.lang.ClassLoader.getResource(ClassLoader.java:998)	at org.glassfish.web.loader.WebappClassLoader.getResource(WebappClassLoader.java:1153)	at net.sf.jasperreports.engine.util.JRResourcesUtil.findClassLoaderResource(JRResourcesUtil.java:473)	at net.sf.jasperreports.engine.util.JRLoader.loadBytesFromLocation(JRLoader.java:464)	at net.sf.jasperreports.engine.JRImageRenderer.getInstance(JRImageRenderer.java:176)	at net.sf.jasperreports.engine.fill.JRFillImage.evaluateImage(JRFillImage.java:944)	at net.sf.jasperreports.engine.fill.JRFillImage.evaluate(JRFillImage.java:891)	at net.sf.jasperreports.engine.fill.JRFillElementContainer.evaluate(JRFillElementContainer.java:256)	at net.sf.jasperreports.engine.fill.JRFillBand.evaluate(JRFillBand.java:482)	at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillColumnBand(JRVerticalFiller.java:2011)	at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillGroupHeader(JRVerticalFiller.java:603)	at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillGroupHeaders(JRVerticalFiller.java:523)	at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReportStart(JRVerticalFiller.java:250)	at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVerticalFiller.java:110)	at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:923)	at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:826)	at net.sf.jasperreports.engine.fill.JRFiller.fillReport(JRFiller.java:59)	at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:417)	at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:247)	at net.sf.jasperreports.engine.JasperRunManager.runReportToPdf(JasperRunManager.java:203)	at org.serv.ReportServlet.generateReport(ReportServlet.java:142)	at org.serv.ReportServlet.doPost(ReportServlet.java:86)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:754)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)	at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1523)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:279)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:188)	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:641)	at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:97)	at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:85)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:185)	at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:325)	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:226)	at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:165)