Помогите Ошибка при экспорте мира, WorldPainter

Спойлер

java.lang.NullPointerException: null
at org.pepsoft.worldpainter.CustomTerrainHelper.getMaterial(CustomTerrainHelper.java:33)
at org.pepsoft.worldpainter.Terrain$15.getMaterial(Terrain.java:593)
at org.pepsoft.worldpainter.exporting.WorldPainterChunkFactory.createChunk(WorldPainterChunkFactory.java:147)
at org.pepsoft.worldpainter.exporting.WorldPainterChunkFactory.createChunk(WorldPainterChunkFactory.java:53)
at org.pepsoft.worldpainter.exporting.WorldExporter.getChunk(WorldExporter.java:540)

WorldPainter version: 1.10.3

java.version: 1.8.0_25
java.vendor: Oracle Corporation
java.vm.version: 25.25-b02
java.vm.vendor: Oracle Corporation
java.vm.name: Java HotSpot(TM) Client VM
os.name: Windows 7
os.arch: x86
os.version: 6.1
user.home: C:\Users\igml
user.dir: C:\Java\WorldPainter
user.country: RU
user.language: ru

Free memory: 68737792 bytes
Total memory size: 1037959168 bytes
Max memory size: 1037959168 bytes

World name: saveitplz
Bounds: -48, -48 => 47, 47
Height: 256
Number of tiles: 7400
Layers in use: Biome, Lava, Pine, Deciduous, Jungle, Void
Border: WATER @ 62
Sub surface material: STONE
Water height: 62

Operation: null
Radius: 50
Brush: Plateau Circle (radius=0, brushShape=CIRCLE, level=1.0)/Sine Circle (radius=0, brushShape=CIRCLE, level=1.0)
Level: 0.51/0.51
Zoom: 0
Hidden layers: [Biome]

В чем ошибка? Нехватка памяти?