[GTS September Hope] NullPointerException: Cannot invoke "VASSAL.counters.GamePiece.getProperty(Object)" because "p" is null

[uckelman]

ABR
Version	3.7.15
Reporter	[email protected]
Error Log	5545 bytes

Conducting a barrage with the German artillery

GTS September Hope v0.4.0 3.7.15

java.lang.NullPointerException: Cannot invoke "VASSAL.counters.GamePiece.getProperty(Object)" because "p" is null
 at VASSAL.counters.Decorator.getOutermost(Decorator.java:642)
 at VASSAL.command.ChangeTracker.(ChangeTracker.java:33)
 at tdc.AttackWizard.doRoll(AttackWizard.java:1102)
 at tdc.attack.FireResolver.doRoll(FireResolver.java:269)