VASSAL does not start on Windows PC

All of a sudden my Vassal 3-7-15 software will not run anymore on my Windows PC, even though it worked fine for many weeks before.

My PC uses Windows 10 Home, Version 22H2, OS build 19045.5011

The problem emerged yesterday. Initially I rolled back a Windows security update that had been installed on 16 Nov, and thereafter was able to start Vassal, but as of today I’m not able to run Vassal, no matter what I do.

When I try to run Vassal, the main Vassal window (with all the game modules) shows up for a second and then closes down automatically by itself

Please post the contents of Vassal’s error log after a failed run.

024-11-20 11:28:27,431 [4388-main] INFO VASSAL.launch.StartUp - Starting
2024-11-20 11:28:27,448 [4388-main] INFO VASSAL.launch.StartUp - OS Windows 10 10.0 amd64
2024-11-20 11:28:27,448 [4388-main] INFO VASSAL.launch.StartUp - Java version 23.0.1
2024-11-20 11:28:27,448 [4388-main] INFO VASSAL.launch.StartUp - Java home C:\Program Files\VASSAL-3.7.15\jre
2024-11-20 11:28:27,448 [4388-main] INFO VASSAL.launch.StartUp - VASSAL version 3.7.15
2024-11-20 11:28:27,547 [4388-AWT-EventQueue-0] INFO VASSAL.launch.ModuleManager - Manager
2024-11-20 11:28:56,647 [4388-SwingWorker-pool-2-thread-1] INFO VASSAL.launch.AbstractLaunchAction - Loading module file D:\Privat\VASSAL Games\GB-EatG-CB 2025 Master.vmod
2024-11-20 11:28:58,508 [4388-SwingWorker-pool-2-thread-1] INFO VASSAL.launch.TilingHandler - No images to tile.
2024-11-20 11:28:58,510 [4388-SwingWorker-pool-2-thread-1] INFO VASSAL.launch.AbstractLaunchAction - Loading module OCS - GB-EatG/CB 2025
2024-11-20 11:28:58,515 [4388-SwingWorker-pool-2-thread-1] INFO VASSAL.tools.io.ProcessLauncher - launching C:\Program Files\VASSAL-3.7.15\jre\bin\java -Xms1024M -Xmx1024M -Duser.home=C:\Users\Playtech -Duser.dir=C:\Program Files\VASSAL-3.7.15 -cp lib\Vengine.jar VASSAL.launch.Player --load – D:\Privat\VASSAL Games\GB-EatG-CB 2025 Master.vmod
2024-11-20 11:28:59,174 [4020-main] INFO VASSAL.launch.StartUp - Starting
2024-11-20 11:28:59,186 [4020-main] INFO VASSAL.launch.StartUp - OS Windows 10 10.0 amd64
2024-11-20 11:28:59,186 [4020-main] INFO VASSAL.launch.StartUp - Java version 23.0.1
2024-11-20 11:28:59,186 [4020-main] INFO VASSAL.launch.StartUp - Java home C:\Program Files\VASSAL-3.7.15\jre
2024-11-20 11:28:59,186 [4020-main] INFO VASSAL.launch.StartUp - VASSAL version 3.7.15
2024-11-20 11:28:59,186 [4020-main] INFO VASSAL.launch.Launcher - Player
2024-11-20 11:29:02,119 [4020-AWT-EventQueue-0] INFO VASSAL.build.GameModule - OCS - GB-EatG/CB 2025 version Rev 7/28/2024
2024-11-20 11:29:17,991 [4020-Thread-0] INFO VASSAL.build.module.GameState - Loading save game D:\Privat\VASSAL Games\GB-EatG-CB 2025 6-10-24\Typhoon - 1Oct Start - Roy Lane\Oct 12\0077 Oct 12 '41 Axis Exploit Combat.vlog, created with module version Rev 7/28/2024
2024-11-20 11:48:56,437 [4020-AWT-EventQueue-0] INFO VASSAL.build.GameModule - Exiting
2024-11-20 14:15:33,641 [4388-SwingWorker-pool-2-thread-2] INFO VASSAL.launch.AbstractLaunchAction - Loading module file D:\Privat\VASSAL Games\GB-EatG-CB 2025 Master.vmod
2024-11-20 14:15:34,463 [4388-SwingWorker-pool-2-thread-2] INFO VASSAL.launch.TilingHandler - No images to tile.
2024-11-20 14:15:34,464 [4388-SwingWorker-pool-2-thread-2] INFO VASSAL.launch.AbstractLaunchAction - Loading module OCS - GB-EatG/CB 2025
2024-11-20 14:15:34,465 [4388-SwingWorker-pool-2-thread-2] INFO VASSAL.tools.io.ProcessLauncher - launching C:\Program Files\VASSAL-3.7.15\jre\bin\java -Xms1024M -Xmx1024M -Duser.home=C:\Users\Playtech -Duser.dir=C:\Program Files\VASSAL-3.7.15 -cp lib\Vengine.jar VASSAL.launch.Player --load – D:\Privat\VASSAL Games\GB-EatG-CB 2025 Master.vmod
2024-11-20 14:15:35,164 [2256-main] INFO VASSAL.launch.StartUp - Starting
2024-11-20 14:15:35,174 [2256-main] INFO VASSAL.launch.StartUp - OS Windows 10 10.0 amd64
2024-11-20 14:15:35,174 [2256-main] INFO VASSAL.launch.StartUp - Java version 23.0.1
2024-11-20 14:15:35,174 [2256-main] INFO VASSAL.launch.StartUp - Java home C:\Program Files\VASSAL-3.7.15\jre
2024-11-20 14:15:35,174 [2256-main] INFO VASSAL.launch.StartUp - VASSAL version 3.7.15
2024-11-20 14:15:35,175 [2256-main] INFO VASSAL.launch.Launcher - Player
2024-11-20 14:15:37,563 [2256-AWT-EventQueue-0] INFO VASSAL.build.GameModule - OCS - GB-EatG/CB 2025 version Rev 7/28/2024
2024-11-20 14:15:53,299 [2256-Thread-0] INFO VASSAL.build.module.GameState - Loading save game D:\Privat\VASSAL Games\GB-EatG-CB 2025 6-10-24\Typhoon - 1Oct Start - Roy Lane\Oct 12\0077 Oct 12 '41 Axis Exploit Combat save Rev.vsav, created with module version Rev 7/28/2024

I think that was not an error log from a previously failed Vassal start. Meanwhile I rebooted my PC several times and then suddenly was able to start Vassal again.
Additionally I had uninstalled a Windows (security) update dated November 16 and stopped automatic Windows updates for the moment

1 Like

Not advisable. Perhaps check your computer clock - from the log above

2024-11-20 14:15:35,175 [2256-main] INFO VASSAL.launch.Launcher - Player

it seems like your computer has perhaps travelled to the future - your post was at 2024-11-20 02:32 (GMT+1). That can be a problem for Windoze security checks.

Just a thought - might not be the problem.

Oh, and when pasting a log, put ``` (3 back-ticks) before and after the paste to make it easier to read :smile:

Yours,
Christian

1 Like

Hi Christian,

thanks for your additional response. My computer clock is actually fine. I live in New Zealand, and that was indeed the local time when I submitted my post :slight_smile:
Cheers
Thomas