java.lang.NullPointerException

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  • error importing uml file
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    • java.lang.NullPointerException: Attempt to read from field 'java.util.TreeMap$Node java.util.TreeMap$Node.left' on a null object reference at java.util.TreeMap.rotateLeft(TreeMap.java:525) at java.util.TreeMap.rebalance(TreeMap.java:479) at java.util.TreeMap.find(TreeMap.java:324) at java.util.TreeMap.putInternal(TreeMap.java:240) at java.util.TreeMap.put(TreeMap.java:186) at java.util.TreeSet.add(TreeSet.java:113) at com.mousebird.maply.TextureManager.addTexture(TextureManager.java:89) at com.mousebird.maply.MaplyBaseController$7.run(MaplyBaseController.java:1162) at com.mousebird.maply.MaplyBaseController.addTask(MaplyBaseController.java:988) at com.mousebird.maply.MaplyBaseController.addScreenMarkers(MaplyBaseController.java:1192) at com.ironbird.fav2.map.style.ComponentStyle.buildMarkerObjects(ComponentStyle.java:571) at com.ironbird.fav2.map.style.ComponentStyle.buildObjects(ComponentStyle.java:438) at com.mousebird.maply.MapboxVectorTileSource$1.run(MapboxVectorTileSource.java:133) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:145) at android.os.HandlerThread.run(HandlerThread.java:61)

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