Error: Matches#lambda$ unit Has Taken Some Bombing Unit Damage $43:386

TheDog

Im working on my latest map and with this code

<property name="Damage From Bombing Done To Units Instead Of Territories" value="true" editable="false"

I get this error message after 6-9 turns.

2.5.22294: Matches#lambda$unitHasTakenSomeBombingUnitDamage$43:386 - java.lang.NullPointerException

## Map
feudal_nippon

## TripleA Version
2.5.22294

## Java Version
11.0.6

## Operating System
Windows 10

## Memory
Heap utilization statistics [MB]
Used Memory: 323
Free memory: 1656
Total memory: 1979
Max memory: 1979


## Stack Trace

Exception: java.lang.NullPointerException
java.lang.Exception
	at games.strategy.triplea.delegate.Matches.lambda$unitHasTakenSomeBombingUnitDamage$43(Matches.java:386)
	at games.strategy.triplea.ai.pro.ProPurchaseAi.repair(ProPurchaseAi.java:105)
	at games.strategy.triplea.ai.pro.AbstractProAi.purchase(AbstractProAi.java:172)
	at games.strategy.triplea.ai.AbstractAi.start(AbstractAi.java:507)
	at games.strategy.engine.framework.ServerGame.waitForPlayerToFinishStep(ServerGame.java:537)
	at games.strategy.engine.framework.ServerGame.runStep(ServerGame.java:407)
	at games.strategy.engine.framework.ServerGame.startGame(ServerGame.java:297)
	at games.strategy.engine.framework.startup.launcher.LocalLauncher.launchInternal(LocalLauncher.java:82)
	at games.strategy.engine.framework.startup.launcher.LocalLauncher.lambda$launch$0(LocalLauncher.java:56)
	at java.base/java.lang.Thread.run(Thread.java:834)

For a few turns it works fine then errors

It gives

Territory units placement is based off <option name="canProduceXUnits" value="4"/>
Bombing attacks units

Setting it to false and I get no error message but it does the two things I dont want.

Territory units placement is based off the territory PU
Bombing attacks the territory and not the unit.

Any guidance for where to look or what to test?

TheDog

I had

<option name="canBeDamaged" value="true"/>
		<option name="canDieFromReachingMaxDamage" value="true"/>
		<option name="maxDamage" value="2"/>

To stop the error add the following to the same unit

<option name="isConstruction" value="true"/>
	<option name="constructionType" value="Recruit"/>
         <option name="maxConstructionsPerTypePerTerr" value="1"/>
	<option name="constructionsPerTerrPerTypePerTurn" value="1"/>