flex报的错误，完整的错误如下：
ReferenceError: Error #1065: 变量 未定义。 at global/flash.utils::getDefinitionByName() at mx.utils::DescribeTypeCache$/describeType()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\utils\DescribeTypeCache.as:95] at mx.utils::ObjectUtil$/getClassInfo()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\utils\ObjectUtil.as:829] at mx.controls::DataGrid/generateCols()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\controls\DataGrid.as:2407] at mx.controls::DataGrid/collectionChangeHandler()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\controls\DataGrid.as:4132] at mx.controls.listClasses::ListBase/set dataProvider()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\controls\listClasses\ListBase.as:1827] at mx.controls::DataGrid/set dataProvider()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\controls\DataGrid.as:1334] at mx.core::Container/createComponentFromDescriptor()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\Container.as:3595] at mx.core::Container/createComponentsFromDescriptors()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\Container.as:3493] at mx.containers::Panel/createComponentsFromDescriptors()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\containers\Panel.as:1528] at mx.core::Container/createChildren()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\Container.as:2589] at mx.containers::Panel/createChildren()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\containers\Panel.as:1056] at mx.core::UIComponent/initialize()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\UIComponent.as:5370] at mx.core::Container/initialize()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\Container.as:2526] at mx.core::UIComponent/http://www.adobe.com/2006/flex/mx/internal::childAdded()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\UIComponent.as:5267] at mx.core::Container/http://www.adobe.com/2006/flex/mx/internal::childAdded()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\Container.as:3305] at mx.core::Container/addChildAt()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\Container.as:2217] at mx.core::Container/addChild()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\Container.as:2140] at mx.core::Container/createComponentFromDescriptor()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\Container.as:3681] at mx.core::Container/createComponentsFromDescriptors()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\Container.as:3493] at mx.core::Container/createChildren()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\Container.as:2589] at mx.core::UIComponent/initialize()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\UIComponent.as:5370] at mx.core::Container/initialize()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\Container.as:2526] at mx.core::UIComponent/http://www.adobe.com/2006/flex/mx/internal::child