![已解决】C#程序excel处理出错:Additional information: Unable to cast COM object of type 'Microsoft.Office.Interop.Excel.ApplicationClass' to interface type 'Microsoft.Office.Interop.Excel._Application' – 在路上 已解决】C#程序excel处理出错:Additional information: Unable to cast COM object of type 'Microsoft.Office.Interop.Excel.ApplicationClass' to interface type 'Microsoft.Office.Interop.Excel._Application' – 在路上](https://www.crifan.com/files/pic/uploads/2013/12/Unable-to-cast-COM-object-of-type-Microsoft.Office.Interop.Excel_.ApplicationClass-to-interface-t.png)
已解决】C#程序excel处理出错:Additional information: Unable to cast COM object of type 'Microsoft.Office.Interop.Excel.ApplicationClass' to interface type 'Microsoft.Office.Interop.Excel._Application' – 在路上
Unable to cast COM object of type 'Inventor.ApprenticeServerComponentClass'" when trying to use Copy Design and/or rename file in Vault | Inventor 2019 | Autodesk Knowledge Network
Error in rule: "Unable to cast COM object of type 'Microsoft.Office.Interop.Excel.ApplicationClass'" when running a GoExcel rule in Inventor | Inventor 2018 | Autodesk Knowledge Network
![Unable to cast COM object of type 'System.__ComObject' to interface type 'Microsoft.SqlServer.Dts.Runtime.Wrapper.IDTSVariables100'. | Chanmingman's Blog Unable to cast COM object of type 'System.__ComObject' to interface type 'Microsoft.SqlServer.Dts.Runtime.Wrapper.IDTSVariables100'. | Chanmingman's Blog](https://chanmingman.files.wordpress.com/2017/07/071817_1324_unabletocas1.png?w=376)
Unable to cast COM object of type 'System.__ComObject' to interface type 'Microsoft.SqlServer.Dts.Runtime.Wrapper.IDTSVariables100'. | Chanmingman's Blog
![vb.net & office: Unable to cast COM object of type 'Microsoft.Office.Interop.Excel.ApplicationClass' - Stack Overflow vb.net & office: Unable to cast COM object of type 'Microsoft.Office.Interop.Excel.ApplicationClass' - Stack Overflow](https://i.stack.imgur.com/OSzrC.png)
vb.net & office: Unable to cast COM object of type 'Microsoft.Office.Interop.Excel.ApplicationClass' - Stack Overflow
![Solution for 'Unable to cast COM object of type Microsoft.Office.Interop.Outlook.ApplicationClass' error Solution for 'Unable to cast COM object of type Microsoft.Office.Interop.Outlook.ApplicationClass' error](https://3.bp.blogspot.com/-m-CTQXwH6T0/WxgUyNq68aI/AAAAAAAAUHQ/i4Zb9IrHFnc5qxuiuQxWxCV1nsttePmigCLcBGAs/s1600/error-loading-type-library-hresult-0x80029c4a.jpg)
Solution for 'Unable to cast COM object of type Microsoft.Office.Interop.Outlook.ApplicationClass' error
Unable to cast COM object of type 'System.__ComObject' to interface type 'LFSO80Lib.LFDocument'. - Laserfiche Answers
![Error: "Unable to cast COM object of type 'CrystalDecisions.ReportAppServer.Controllers.ReportSourceClass' to interface type CrystalDecisions.ReportAppServer.Controllers.!SCRReportSource' Error: "Unable to cast COM object of type 'CrystalDecisions.ReportAppServer.Controllers.ReportSourceClass' to interface type CrystalDecisions.ReportAppServer.Controllers.!SCRReportSource'](https://support.na.sage.com/Platform/Publishing/images/CP_CE/5961bdab-a49a-d201-5455-bbc17959aa01_image_26.4.2018.13.48.34.967.png)
Error: "Unable to cast COM object of type 'CrystalDecisions.ReportAppServer.Controllers.ReportSourceClass' to interface type CrystalDecisions.ReportAppServer.Controllers.!SCRReportSource'
![Unable to cast COM object of type 'System.__ComObject' to interface type 'EnvDTE.Project' - Stack Overflow Unable to cast COM object of type 'System.__ComObject' to interface type 'EnvDTE.Project' - Stack Overflow](https://i.stack.imgur.com/NlMBB.png)
Unable to cast COM object of type 'System.__ComObject' to interface type 'EnvDTE.Project' - Stack Overflow
![Unable to cast COM object of type (No such interface supported (Exception from HRESULT: 0x80004002 (E_NOINTERFACE))) - Stack Overflow Unable to cast COM object of type (No such interface supported (Exception from HRESULT: 0x80004002 (E_NOINTERFACE))) - Stack Overflow](https://i.stack.imgur.com/BiG7I.png)
Unable to cast COM object of type (No such interface supported (Exception from HRESULT: 0x80004002 (E_NOINTERFACE))) - Stack Overflow
![vb.net & office: Unable to cast COM object of type 'Microsoft.Office.Interop.Excel.ApplicationClass' - Stack Overflow vb.net & office: Unable to cast COM object of type 'Microsoft.Office.Interop.Excel.ApplicationClass' - Stack Overflow](https://i.stack.imgur.com/6hfyX.png)
vb.net & office: Unable to cast COM object of type 'Microsoft.Office.Interop.Excel.ApplicationClass' - Stack Overflow
![Unable to cast COM object of type 'Microsoft.Office.Interop.Word.ApplicationClass' - RocketDocs Help Unable to cast COM object of type 'Microsoft.Office.Interop.Word.ApplicationClass' - RocketDocs Help](https://tw-desk-files.teamwork.com/i/482835/attachment-inline/174126.20181226182128997.174126.201812261821289971UYNJ.png)
Unable to cast COM object of type 'Microsoft.Office.Interop.Word.ApplicationClass' - RocketDocs Help
![More Information on 'Library not registered ... TYPE_E_LIBNOTREGISTERED' errors, relating to Microsoft COM "Interop assemblies" (corruption in the Windows registry) More Information on 'Library not registered ... TYPE_E_LIBNOTREGISTERED' errors, relating to Microsoft COM "Interop assemblies" (corruption in the Windows registry)](https://www.ibm.com/support/pages/system/files/inline-images/image_6053.png)
More Information on 'Library not registered ... TYPE_E_LIBNOTREGISTERED' errors, relating to Microsoft COM "Interop assemblies" (corruption in the Windows registry)
![Management Reporter 2012 - Unable to cast COM object type error - Microsoft Dynamics GP Forum Community Forum Management Reporter 2012 - Unable to cast COM object type error - Microsoft Dynamics GP Forum Community Forum](https://community.dynamics.com/cfs-file.ashx/__key/communityserver-discussions-components-files/32/UnableToCast.jpg)
Management Reporter 2012 - Unable to cast COM object type error - Microsoft Dynamics GP Forum Community Forum
![Unable to cast COM object of type 'Microsoft.Office.Interop.Excel.ApplicationClass' - RocketDocs Help Unable to cast COM object of type 'Microsoft.Office.Interop.Excel.ApplicationClass' - RocketDocs Help](https://tw-desk-files.teamwork.com/i/482835/attachment-inline/174126.20181226183430051.174126.20181226183430051FmKES.png)
Unable to cast COM object of type 'Microsoft.Office.Interop.Excel.ApplicationClass' - RocketDocs Help
![Unable to cast COM object of type 'CrystalDecisions.ReportAppServer.Controllers.ReportSourceClass' - Stack Overflow Unable to cast COM object of type 'CrystalDecisions.ReportAppServer.Controllers.ReportSourceClass' - Stack Overflow](https://i.stack.imgur.com/iwWM5.png)