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Exception launching Vasssal on Mac

Issues with the Vassal engine.

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Exception launching Vasssal on Mac

Postby lagouyn » July 12th, 2019, 4:34 pm


All of a sudden, I'm getting an exception shortly after Vassal has launched.

Model: Apple MacBook Pro
OS: 10.13.6 (High Sierra)
CPU: 2.9 GHz Intel Core i7
Memory: 16GB
Video: Radeon Pro 560 4096 MB graphics
VASSAL: 3.2.17
Java: 1.8.0_111
Module: *none*

After launching, Vassal appears in the Dock for several seconds, and then terminates. Error log contents:

2019-07-12 09:21:38,770 [0-main] INFO VASSAL.launch.StartUp - Starting
2019-07-12 09:21:38,775 [0-main] INFO VASSAL.launch.StartUp - OS Mac OS X 10.13.6
2019-07-12 09:21:38,775 [0-main] INFO VASSAL.launch.StartUp - Java version 1.8.0_211
2019-07-12 09:21:38,775 [0-main] INFO VASSAL.launch.StartUp - VASSAL version 3.2.17
2019-07-12 09:21:39,142 [0-AWT-EventQueue-0] INFO VASSAL.launch.ModuleManager - Manager
2019-07-12 09:21:39,168 [0-AWT-EventQueue-0] ERROR -
java.lang.ExceptionInInitializerError: null
at VASSAL.launch.ModuleManager.launch( ~[Vengine.jar:na]
at VASSAL.launch.ModuleManager$ ~[Vengine.jar:na]
at java.awt.event.InvocationEvent.dispatch( ~[na:1.8.0_211]
at java.awt.EventQueue.dispatchEventImpl( ~[na:1.8.0_211]
at java.awt.EventQueue.access$500( ~[na:1.8.0_211]
at java.awt.EventQueue$ ~[na:1.8.0_211]
at java.awt.EventQueue$ ~[na:1.8.0_211]
at Method) ~[na:1.8.0_211]
at$JavaSecurityAccessImpl.doIntersectionPrivilege( ~[na:1.8.0_211]
at java.awt.EventQueue.dispatchEvent( ~[na:1.8.0_211]
at java.awt.EventDispatchThread.pumpOneEventForFilters( [na:1.8.0_211]
at java.awt.EventDispatchThread.pumpEventsForFilter( [na:1.8.0_211]
at java.awt.EventDispatchThread.pumpEventsForHierarchy( [na:1.8.0_211]
at java.awt.EventDispatchThread.pumpEvents( [na:1.8.0_211]
at java.awt.EventDispatchThread.pumpEvents( [na:1.8.0_211]
at [na:1.8.0_211]
Caused by: java.lang.NullPointerException: null
at java.awt.Window.init( ~[na:1.8.0_211]
at java.awt.Window.<init>( ~[na:1.8.0_211]
at java.awt.Frame.<init>( ~[na:1.8.0_211]
at java.awt.Frame.<init>( ~[na:1.8.0_211]
at javax.swing.JFrame.<init>( ~[na:1.8.0_211]
at VASSAL.launch.ModuleManagerWindow.<init>( ~[Vengine.jar:na]
at VASSAL.launch.ModuleManagerWindow.<clinit>( ~[Vengine.jar:na]
... 16 common frames omitted

Could someone help me with this?
Posts: 2
Joined: July 12th, 2019, 4:27 pm

Re: Exception launching Vasssal on Mac

Postby lagouyn » July 15th, 2019, 1:43 pm

I was using an external monitor. Once I unplugged the monitor and re-launched on the laptop's display, it worked correctly. After that, I was once again able to run it on the external monitor.
Posts: 2
Joined: July 12th, 2019, 4:27 pm

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