Hello MrExcel,last night I watched the video on youtube to learn powerpivot form ExcelIsFun. Today I practiced it in person. But when I added a colum and wanted to use the RELATED function to calculate the net profit，Microsoft always gave me the message：
无法将类型为“System.__ComObject”的 COM 对象强制转换为接口类型“Microsoft.Office.Interop.Excel.Application”。此操作失败的原因是对 IID 为“{000208D5-0000-0000-C000-000000000046}”的接口的 COM 组件调用 QueryInterface 因以下错误而失败: 库没有注册。 (异常来自 HRESULT:0x8002801D (TYPE_E_LIBNOTERGISTERED))
I hope to get your help，thank you very much！
——A lover of Excel from China
无法将类型为“System.__ComObject”的 COM 对象强制转换为接口类型“Microsoft.Office.Interop.Excel.Application”。此操作失败的原因是对 IID 为“{000208D5-0000-0000-C000-000000000046}”的接口的 COM 组件调用 QueryInterface 因以下错误而失败: 库没有注册。 (异常来自 HRESULT:0x8002801D (TYPE_E_LIBNOTERGISTERED))
I hope to get your help，thank you very much！
——A lover of Excel from China
