Error: Skin for YHD0.WindowedApplicationSkin2.Group3.contentGroup.ScrollBarBase7 cannot be found.

1、错误描述

Error: Skin for YHD0.WindowedApplicationSkin2.Group3.contentGroup.ScrollBarBase7 cannot be found.
	at spark.components.supportClasses::SkinnableComponent/attachSkin()[E:dev4.yframeworksprojectssparksrcsparkcomponentssupportClassesSkinnableComponent.as:698]
	at spark.components.supportClasses::SkinnableComponent/validateSkinChange()[E:dev4.yframeworksprojectssparksrcsparkcomponentssupportClassesSkinnableComponent.as:443]
	at spark.components.supportClasses::SkinnableComponent/createChildren()[E:dev4.yframeworksprojectssparksrcsparkcomponentssupportClassesSkinnableComponent.as:406]
	at mx.core::UIComponent/initialize()[E:dev4.yframeworksprojectsframeworksrcmxcoreUIComponent.as:7634]
	at mx.core::UIComponent/http://www.adobe.com/2006/flex/mx/internal::childAdded()[E:dev4.yframeworksprojectsframeworksrcmxcoreUIComponent.as:7495]
	at mx.core::UIComponent/addChildAt()[E:dev4.yframeworksprojectsframeworksrcmxcoreUIComponent.as:7199]
	at spark.components::Group/addDisplayObjectToDisplayList()[E:dev4.yframeworksprojectssparksrcsparkcomponentsGroup.as:2037]
	at spark.components::Group/http://www.adobe.com/2006/flex/mx/internal::elementAdded()[E:dev4.yframeworksprojectssparksrcsparkcomponentsGroup.as:1628]
	at spark.components::Group/setMXMLContent()[E:dev4.yframeworksprojectssparksrcsparkcomponentsGroup.as:633]
	at spark.components::Group/set mxmlContent()[E:dev4.yframeworksprojectssparksrcsparkcomponentsGroup.as:573]
	at spark.components::SkinnableContainer/set mxmlContent()[E:dev4.yframeworksprojectssparksrcsparkcomponentsSkinnableContainer.as:657]
	at spark.components::SkinnableContainer/createDeferredContent()[E:dev4.yframeworksprojectssparksrcsparkcomponentsSkinnableContainer.as:1050]
	at spark.components::SkinnableContainer/createContentIfNeeded()[E:dev4.yframeworksprojectssparksrcsparkcomponentsSkinnableContainer.as:1078]
	at spark.components::SkinnableContainer/createChildren()[E:dev4.yframeworksprojectssparksrcsparkcomponentsSkinnableContainer.as:885]
	at spark.components::Application/createChildren()[E:dev4.yframeworksprojectssparksrcsparkcomponentsApplication.as:1504]
	at mx.core::UIComponent/initialize()[E:dev4.yframeworksprojectsframeworksrcmxcoreUIComponent.as:7634]
	at spark.components::Application/initialize()[E:dev4.yframeworksprojectssparksrcsparkcomponentsApplication.as:1355]
	at spark.components::WindowedApplication/initialize()[E:dev4.yframeworksprojectsairsparksrcsparkcomponentsWindowedApplication.as:1834]
	at YHD/initialize()
	at mx.managers.systemClasses::ChildManager/childAdded()[E:dev4.yframeworksprojectsframeworksrcmxmanagerssystemClassesChildManager.as:189]
	at mx.managers.systemClasses::ChildManager/initializeTopLevelWindow()[E:dev4.yframeworksprojectsframeworksrcmxmanagerssystemClassesChildManager.as:359]
	at mx.managers::SystemManager/initializeTopLevelWindow()[E:dev4.yframeworksprojectsframeworksrcmxmanagersSystemManager.as:3057]
	at mx.managers::SystemManager/http://www.adobe.com/2006/flex/mx/internal::kickOff()[E:dev4.yframeworksprojectsframeworksrcmxmanagersSystemManager.as:2843]
	at mx.managers::SystemManager/http://www.adobe.com/2006/flex/mx/internal::preloader_completeHandler()[E:dev4.yframeworksprojectsframeworksrcmxmanagersSystemManager.as:2723]
	at flash.events::EventDispatcher/dispatchEventFunction()
	at flash.events::EventDispatcher/dispatchEvent()
	at mx.preloaders::Preloader/timerHandler()[E:dev4.yframeworksprojectsframeworksrcmxpreloadersPreloader.as:542]
	at flash.utils::Timer/_timerDispatch()
	at flash.utils::Timer/tick()

2、错误原因

3、解决办法