Hi, I got an Out of memory error when I try to generate an excel using JasperReport 3.5.2.jar. Previously I used iReport 3.0 to design and JasperReport 3.5.jar to generate the same excel, it worked fine without any errors. Now when I try with the JasperReport 3.5.2.jar, my application is hanging up (probably going into an infinite loop) Following is the stack trace. What could be the reason? Note: My report is not a huge report........ It could be less than 100kB Code:Exception in thread "Dispatch Worker" java.lang.OutOfMemoryError: Java heap spaceException in thread "Geronimo hot deploy scanner" java.lang.OutOfMemoryError: Java heap space at java.lang.String.<init>(String.java:174) at java.io.Win32FileSystem.resolve(Win32FileSystem.java:240) at java.io.File.<init>(File.java:179) at java.io.File.listFiles(File.java:1020) at org.apache.geronimo.deployment.hot.DirectoryMonitor.getLastModifiedInDir(DirectoryMonitor.java:447) at org.apache.geronimo.deployment.hot.DirectoryMonitor.getLastModifiedInDir(DirectoryMonitor.java:455) at org.apache.geronimo.deployment.hot.DirectoryMonitor.getDirectoryInfo(DirectoryMonitor.java:441) at org.apache.geronimo.deployment.hot.DirectoryMonitor.scanDirectory(DirectoryMonitor.java:271) at org.apache.geronimo.deployment.hot.DirectoryMonitor.run(DirectoryMonitor.java:217) at java.lang.Thread.run(Thread.java:595)