8143338 [Thread-4] INFO exerelin.world.NexMarketBuilder - Adding key industry Heavy Industry to market Satyricon (priority 415.0)
8143351 [Thread-8] INFO sound.oo0O - Cleaning up music with id [miscallenous_main_menu.ogg]
8143500 [Thread-10] INFO sound.oo0O - Creating streaming player for music with id [miscallenous_main_menu.ogg]
8143506 [Thread-10] INFO sound.null - Playing music with id [miscallenous_main_menu.ogg]
8146978 [Thread-4] ERROR com.fs.starfarer.combat.CombatMain - java.lang.NullPointerException
java.lang.NullPointerException
at exerelin.world.NexMarketBuilder.addKeyIndustriesForFaction(NexMarketBuilder.java:715)
at exerelin.world.ExerelinProcGen.populateSector(ExerelinProcGen.java:1609)
at exerelin.world.ExerelinProcGen.generate(ExerelinProcGen.java:1007)
at exerelin.plugins.ExerelinModPlugin.onNewGameAfterProcGen(ExerelinModPlugin.java:361)
at com.fs.starfarer.campaign.save.CampaignGameManager.super(Unknown Source)
at com.fs.starfarer.title.TitleScreenState.dialogDismissed(Unknown Source)
at com.fs.starfarer.ui.N.dismiss(Unknown Source)
at com.fs.starfarer.ui.impl.K.dismiss(Unknown Source)
at com.fs.starfarer.campaign.save.if.actionPerformed(Unknown Source)
at com.fs.starfarer.ui.newnew.buttonPressed(Unknown Source)
at com.fs.starfarer.ui.I.Ò00000(Unknown Source)
at com.fs.starfarer.ui.I.processInput(Unknown Source)
at com.fs.starfarer.ui.O0Oo.o00000(Unknown Source)
at com.fs.starfarer.BaseGameState.traverse(Unknown Source)
at com.fs.state.AppDriver.begin(Unknown Source)
at com.fs.starfarer.combat.CombatMain.main(Unknown Source)
at com.fs.starfarer.StarfarerLauncher$1.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
and i dont know how to see the source and why its happening can someone help me?