These are the steps to set the property in a Linux environment.
1) In the <<Jasper Installed Location>>/apache-tomcat/bin please locate and edit the “setenv.sh” file.
2) In this file in second line please insert this option “JAVA_OPTS=”$JAVA_OPTS -Djava.awt.headless=true”
3) Please save the file.
4) Then restart the tomcat server.
5) Once the tomcat server has restarted. Please rerun the report. It should now work successfully.