[away3d] Error after Prefab BSP/PVS Generator

[metSyS]

I'm creating Cube primitive? set camera above the cube primitive, and
compile. Then I copy two files(MyBSPProject.as & MyBSPTree.awd) and
one folder(images), to the source folder and run it in debug player.
The player says that there is an error :

"TypeError: Error #1009: Не удается вызвать свойство или метод со
ссылкой на объект "null".
        at away3d.loaders::AWData/linkBSPNodes()[E:\T E A C H\Flex\projects
\MyPlateTree\src\away3d\loaders\AWData.as:440]
        at away3d.loaders::AWData/prepareData()[E:\T E A C H\Flex\projects
\MyPlateTree\src\away3d\loaders\AWData.as:281]
        at away3d.loaders::AbstractParser/parseGeometry()[E:\T E A C H\Flex
\projects\MyPlateTree\src\away3d\loaders\AbstractParser.as:420]
        at away3d.loaders::Loader3D/loadTextures()[E:\T E A C H\Flex\projects
\MyPlateTree\src\away3d\loaders\Loader3D.as:508]
        at away3d.loaders::Loader3D$/parse()[E:\T E A C H\Flex\projects
\MyPlateTree\src\away3d\loaders\Loader3D.as:61]
        at away3d.loaders::AWData$/parse()[E:\T E A C H\Flex\projects
\MyPlateTree\src\away3d\loaders\AWData.as:519]
        at MyPlateTree/initAway3D()[E:\T E A C H\Flex\projects\MyPlateTree\src
\MyPlateTree.as:91]
        at MyPlateTree/init()[E:\T E A C H\Flex\projects\MyPlateTree\src
\MyPlateTree.as:67]
"

the line 91 is:

_tree = BSPTree(AWData.parse(new BSPFile(), {customPath:"./
images/"}));

What am I do wrong?