: JR 6.3.0 was compiled with Java 8 (major version 52). Trying to run on Java 7 or earlier fails. Fix : Upgrade to Java 8 or newer (Java 9+ works with module exports, but test first).
Java cannot find physical fonts on the server. Fix: Use font extensions introduced in 6.3.0. Create a fonts.xml mapping file. jasperreports-6.3.0.jar download