Export to excel option doesn't work for more than 40000 rows for a BCM KPI. What could be the reason?

Export to excel option doesn't work for more than 40000 rows for a BCM KPI. What could be the reason?

Please ensure you have the latest jar files for the jasper reports: 1).lib\jxl-2.6.3.jar 2).lib\jasperreports-3.1.4.jar 3).jasperreports-3.1.4.jar If these jar files do not work then, copy the class file along with jasperreports-3.1.4.jar file (Delete the existing jasper report jar file) Path for class file : classes\com\manthan\arc\ui\