More Zone Creation Problems

When drawing in an Area on the Map using the Add Zone tool, the map flashes on and off. Once the area is drawn in and I attempt to save the module, the program locks up. It will not do anything. You cannot get it to shut down short of Control-Alt-Delete

This error message shows up when I do use Control Alt Delete: Open JDK Binary is Not Responding

Error Logs
2021-06-26 03:46:48,223 [732-main] INFO VASSAL.launch.StartUp - Starting
2021-06-26 03:46:48,270 [732-main] INFO VASSAL.launch.StartUp - OS Windows 7 6.1
2021-06-26 03:46:48,270 [732-main] INFO VASSAL.launch.StartUp - Java version 16
2021-06-26 03:46:48,270 [732-main] INFO VASSAL.launch.StartUp - VASSAL version 3.5.7
2021-06-26 03:46:48,597 [732-AWT-EventQueue-0] INFO VASSAL.launch.ModuleManager - Manager

Win 7
HD 384 GB
Vassal Version 3.5.7
Module: WaterlooNapoleonsLastBattlev2

And now when attempting to open the same module, I get this:
WaterlooNapoleonsLastBattlev2.vmod’ is not a valid VASSAL module.

That’s hard to diagnose without any error messages. If Java locks up, that’s typically due to an issue outside of our code—it could be a bug in Java, a bug in your OS or drivers, or a hardware problem. You haven’t said to what your max heap is set, though usually running out of heap manifest itself with an OutOfMemoryException and an error dialog.

Are you able to reproduce the problem consistently? If you can reproduce the problem and you check in Task Manager, how much CPU does java.exe show up as using?

As for the module, you’ve corrupted it by killing VASSAL while the module was being written.

You might find your machine more usable in general if you had more RAM. If you have open RAM slots or if your existing slots are not already at their max capacity, it wouldn’t be very expensive to add RAM.