你好，我正在为三星Gear创建一个小部件。我使用Tizen IDE用于可穿戴设备。我跟随他们的youtube教程:如何创建一个基本的集成齿轮应用程序。
我尝试在Tizen IDE中构建项目，有一个构建错误:
生成过程中发生错误。在项目"SimpleSAPConsumer"上运行构建器"Web Widget builder"时出错。构建错误:无法确定图形元素类型，因为文档类为空。这可能是一个投影，请使用EXPAND()函数构建错误:无法确定图形元素类型，因为文档类为空。这可能是投影，请使用EXPAND()函数
然后错误日志显示:
eclipse.buildId=
java.version=1.7.0_67
java.vendor=Oracle Corporation
BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en
Command-line arguments: -os win32 -ws win32 -arch x86_64
Error
Fri May 29 17:01:28 SGT 2015
Build Error :
java.lang.IllegalArgumentException: Cannot determine the graph element type because the document class is null. Probably this is a projection, use the EXPAND() function
at com.tinkerpop.blueprints.impls.orient.OrientElementIterator.next(OrientElementIterator.java:49)
at com.tinkerpop.blueprints.impls.orient.OrientElementIterator.next(OrientElementIterator.java:13)
at org.tizen.common.builder.dependency.DependencyInDB.getVertexFromDB(DependencyInDB.java:236)
at org.tizen.common.builder.dependency.DependencyInDB.containsVertex(DependencyInDB.java:254)
at org.tizen.common.builder.BuildProcess.removeResource(BuildProcess.java:413)
at org.tizen.common.builder.BuildProcess.build(BuildProcess.java:282)
at org.tizen.web.project.builder.WebBuilder.build(WebBuilder.java:252)
at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:728)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:199)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:239)
at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:292)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:295)
at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:351)
at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:374)
at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:143)
at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:241)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)可能有一个小的拼写错误或某些地方，因为我的猜测是没有'文档'类，因为它可能不存在于内存中，或者你引用一个类(Foo dingDong = new Foo();