Hi Mark, It might help narrow down on the issue if you tried an alternative JDK - I'd suggest Temurin jdk-11
It might also be a good time to update to the latest FOP version. I've tried what you're attempting to do on Temurin 11 / FOP main branch and I had no issues. Regards, Dave ________________________________ From: Mark Giffin <m1...@earthlink.net> Sent: 26 June 2023 07:57 To: fop-users@xmlgraphics.apache.org <fop-users@xmlgraphics.apache.org> Subject: Publishing area tree XML fails I'm using FOP 2.4 on ubuntu. I create an area tree XML file on the command line with this: fop -s topic.fo -at area_tree.xml This works fine. I plan to make some changes and read it in, then publish to PDF. I am trying to read it in and I don't know what to expect, or how to publish out to PDF. The docs do not go into this, that I can find. I get failure when I run the command below intended to produce a PDF called aaa.pdf: fop -atin area_tree.xml aaa.pdf [warning] /usr/bin/fop: JVM flavor 'sun' not understood [ERROR] FOP - Exception <org.apache.fop.apps.FOPException: java.util.EmptyStackException java.util.EmptyStackException>org.apache.fop.apps.FOPException: java.util.EmptyStackException java.util.EmptyStackException at org.apache.fop.cli.InputHandler.transformTo(InputHandler.java:296) at org.apache.fop.cli.AreaTreeInputHandler.renderTo(AreaTreeInputHandler.java:75) at org.apache.fop.cli.Main.startFOP(Main.java:183) at org.apache.fop.cli.Main.main(Main.java:214) Caused by: java.util.EmptyStackException at java.base/java.util.Stack.peek(Stack.java:102) at org.apache.fop.area.AreaTreeParser$Handler.handleExternallyGeneratedObject(AreaTreeParser.java:1089) etc. Any ideas? Thanks, Mark --------------------------------------------------------------------- To unsubscribe, e-mail: fop-users-unsubscr...@xmlgraphics.apache.org For additional commands, e-mail: fop-users-h...@xmlgraphics.apache.org