我正在尝试将“高级搜索”网络部件添加到我的网页部分页面。目前，Web部件正在引发错误对象引用未设置为对象的实例。
从SharePoint日志恢复的完整堆栈跟踪如下所示：
AdvancedSearchBox class encountered unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
at Microsoft.Office.Server.Search.WebControls.AdvancedSearchBox.GetScopeEnumerator(ScopeInformation & defaultScope)
at Microsoft.Office.Server.Search.WebControls.AdvancedSearchBox.CreateScopeRows(Table parentTable)
at Microsoft.Office.Server.Search.WebControls.AdvancedSearchBox.CreateScopingSectionChildControls(Table parentTable)
at Microsoft.Office.Server.Search.WebControls.AdvancedSearchBox.CreateChildControls(). 813aaaa7-5645-43b5-85ba-e8c67a57997b 03/07/2014 05:40:27.31 w3wp.exe (0x10D8) 0x0BEC SharePoint Server Search Query
dmz8 Unexpected AdvancedSearchBox class encountered unexpected error: System.EventArgs. 813aaaa7-5645-43b5-85ba-e8c67a57997b