iReport 5.1.0 was built to run on Java 6 or Java 7. If you try to launch it with a modern Java version (like Java 17 or 21), it will crash immediately.
Right-click the installer and select "Run as Administrator." download jaspersoft ireport designer 5.1.0
💡 Always keep a backup of your ireport.conf and custom .jar drivers (like your SQL connectors) in a separate folder to make future migrations easier. iReport 5