Trying to save a blueprint from multiplayer to local with a new reactor on your entity, will result in a crash.
[LUA] LOADING: \statistics\ship-index-calculation.lua SAVED BLUEPRINT SCORE: EntityIndexScore [version=1, weaponDamageIndex=0.0, weaponRangeIndex=0.0, weaponhitPropabilityIndex=0.0, weaponSpecialIndex=0.0, weaponPowerConsumptionPerSecondIndex=0.0, hitpoints=1040.0, armor=100.0, thrust=8.0, shields=110.00000238418579, jumpDriveIndex=0.0, mass=26.299999237060547, powerRecharge=1.0, maxPower=50000.0, support=0.0, docked=false, turret=false, children=[], offensiveIndex=0.0, defensiveIndex=21.833333412806194, powerIndex=50001.0, mobilityIndex=3041.8251832976594, dangerIndex=3063.6585167104654, survivabilityIndex=3063.6585167104654, supportIndex=0.0] java.lang.NullPointerException at org.schema.schine.resource.tag.Tag.<init>(Tag.java:127) at org.schema.game.common.controller.elements.power.reactor.tree.ReactorTree.toTagStructure(ReactorTree.java:224) at org.schema.game.common.controller.elements.power.reactor.tree.ReactorSet.toTagStructure(ReactorSet.java:124) at org.schema.game.common.controller.elements.power.reactor.PowerImplementation.toTagStructure(PowerImplementation.java:734) at org.schema.game.common.controller.elements.ManagerContainer.toTagStructure(ManagerContainer.java:1620) at org.schema.game.server.data.blueprintnw.BlueprintEntry.writeMeta(BlueprintEntry.java:1413) at org.schema.game.server.data.blueprintnw.BlueprintEntry.write(BlueprintEntry.java:1103) at org.schema.game.server.controller.BluePrintController.writeBluePrint(BluePrintController.java:1173) at org.schema.game.common.data.player.catalog.CatalogManager.writeEntryClient(CatalogManager.java:759) at org.schema.game.common.data.player.PlayerState.handleBluePrintQueuesClient(PlayerState.java:4034) at org.schema.game.common.data.player.PlayerState.updateLocal(PlayerState.java:1413) at org.schema.game.client.controller.GameClientController.updateOthers(GameClientController.java:3176) at org.schema.game.client.controller.GameClientController.update(GameClientController.java:1346) at org.schema.schine.graphicsengine.core.GLFrame.update(GLFrame.java:842) at org.schema.schine.graphicsengine.core.GLFrame.doFrameAndUpdate(GLFrame.java:725) at org.schema.schine.graphicsengine.core.GraphicsContext.mainLoop(GraphicsContext.java:828) at org.schema.schine.graphicsengine.core.GraphicsContext.startUp(GraphicsContext.java:725) at org.schema.game.client.controller.GameMainMenuController.startGraphics(GameMainMenuController.java:1148) at org.schema.game.common.Starter.startMainMenu(Starter.java:1457) at org.schema.game.common.Starter.main(Starter.java:1001)