I am using iReports plugin with NetBeans. After Clean and Build I create FAT JAR of my project using build.xml->right Click-> Run Target as-> Other targets -> package for store. Now I have to deliver this file to my client. But the Problem I am facing is unknown to me. When I run the project in NetBeans it runs report normally see picture here. But When I run it through my .jar file it shows following error. see error picture.In this error Column Number and Line Numbers are given just like any Netbeans error but I am not sure where to look for this error in iReports file. Also why is this error occurring in jar file and not in NetBeans. Thank You!