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com.uttesh.pdfngreport.exceptionHandler.ReportException: Failed generating PDF report. at com.uttesh.pdfngreport.PDFGenerator.generateReport(PDFGenerator.java:88) at com.uttesh.pdfngreport.PDFReportListener.generateReport(PDFReportListener.java:91) at org.testng.TestNG.generateReports(TestNG.java:1089) at org.testng.TestNG.run(TestNG.java:1048) at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:126) at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:152) at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:57)Caused by: java.lang.NullPointerException at com.uttesh.pdfngreport.util.pdf.GenerateTable.populateColumnHeader(GenerateTable.java:247) at com.uttesh.pdfngreport.util.pdf.GenerateTable.generate(GenerateTable.java:63) at com.uttesh.pdfngreport.util.pdf.SuccessTable.populateData(SuccessTable.java:40) at com.uttesh.pdfngreport.util.pdf.SuccessTable.populateSingleTableData(SuccessTable.java:58) at com.uttesh.pdfngreport.PDFGenerator.getTable(PDFGenerator.java:149) at com.uttesh.pdfngreport.PDFGenerator.populatePassedListTable(PDFGenerator.java:97) at com.uttesh.pdfngreport.PDFGenerator.generateReport(PDFGenerator.java:71) ... 6 more