![unable to cast COM object of type 'microsoft.Office.Interop.Excel.ApplicationClass' to 'microsoft.Office.Interop.Excel.Application'" - Stack Overflow unable to cast COM object of type 'microsoft.Office.Interop.Excel.ApplicationClass' to 'microsoft.Office.Interop.Excel.Application'" - Stack Overflow](https://i.stack.imgur.com/8Mymj.jpg)
unable to cast COM object of type 'microsoft.Office.Interop.Excel.ApplicationClass' to 'microsoft.Office.Interop.Excel.Application'" - Stack Overflow
![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)
Unable to cast COM object of type 'CrystalDecisions.ReportAppServer.Controllers.ReportSourceClass' - Stack Overflow
![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
![Intermittent "Unable to cast COM object of type ... The RPC server is unavailable ... 0x800706BA" error when using Excel functions Intermittent "Unable to cast COM object of type ... The RPC server is unavailable ... 0x800706BA" error when using Excel functions](https://www.ibm.com/support/pages/system/files/support/swg/cogtech.nsf/0/c80e20d95d6557e985257ef90053839b/Symptom/0.84.gif)
Intermittent "Unable to cast COM object of type ... The RPC server is unavailable ... 0x800706BA" error when using Excel functions
![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
![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)
![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 'Inventor.ApprenticeServerComponentClass'" when trying to use Copy Design and/or rename file in Vault | Inventor 2019 | Autodesk Knowledge Network
Unable to cast COM object of type 'System.__ComObject' to interface type 'LFSO80Lib.LFDocument'. - Laserfiche Answers
![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
![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)