Hi Rick,
Can you tell me what version of Java you are running? java -version will reveal that.
I’m running Java 21.0.1 on my Mac but I set the target to Java 8. I may be overly optimistic that this latest Java can really target older Java VMs.
The Reorganizer demo is a Java conversion of the C code that Bill Powers posted to the Control Systems Group Network (CSGnet) on July 11, 1992. It looks like each message has a listserv generated ID and the one for that message is 920711.0800. It looks like it got loaded into Discourse here: Reorganization - #27 by William_T_Powers2 (make sure to click the 3 dots to expand the text — the C code is at the bottom of that particular message).
So that one is not LCS III but one that I moved over to play with as part of my own research on reorganization.