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- Dec 11, 2017 Could not load file or assembly 'Office, Version=15.0.0.0' I've Devoloped Software using VB.Net And I used ( Microsoft.Office.Interop.Excel ) Library in it Now I want to use this Software in other Computer Which have No excel installed in it.
- This software was originally created by Microsoft. GROOVE.EXE, MSPUB.EXE, OUTLOOK.EXE, EXCEL.EXE and WINWORD.EXE are the most common filenames for this program's installer. The most popular versions of the Microsoft Office Professional are 15.0, 14.0 and 12.0. Our antivirus check shows that this download is safe.
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Seeing 'Could not load file or assembly 'Microsoft.Office.Interop.Outlook, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c' or one of its dependencies. Access is denied.' error on Outlook 2013 with Win10 machines
Microsoft Office Version 15.0
EnterpriseDev
Posts: 65
Joined: 2016-07-01
| I am seeing the error below for multiple independent customers who all are running Win10 with Outlook 2013. It only happens on clean machines, and it started happening in May 2019. Restarting or reinstalling Outlook does not seem to help.
Could not load file or assembly 'Microsoft.Office.Interop.Outlook, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c' or one of its dependencies. Access is denied.
The 'Microsoft.Office.Interop.Outlook.dll' is present in Program Files (x86), and the key to the error message seems to be 'Access is defined' at the end of the error string.
How would you debug this on a customer's machine? Have you seen this before? Any clue? |
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Dmitry Kostochko
Add-in Express team
Posts: 2870
Joined: 2004-04-05
| Hello,
We faced similar issues but with 2016 version of Outlook and Excel. Usually, after successful installation or update of Office applications, their Primary Interop Assemblies (PIAs) are located in GAC:
C:WindowsassemblyGAC_MSILMicrosoft.Office.Interop.Outlook15.0.0.0__71e9bce111e9429c
C:WindowsassemblyGAC_MSILMicrosoft.Vbe.Interop15.0.0.0__71e9bce111e9429c
C:WindowsassemblyGAC_MSILoffice15.0.0.0__71e9bce111e9429c
Please check these locations on your customer's machine, probably you will find something abnormal.
If your add-in targets .NET Framework 4.0 or higher, you can set the 'Embed Interop Types' property for all interops to True. This will embed all used Office types into your assembly, and interop assemblies (Microsoft.Office.Interop.Outlook.dll, Microsoft.Vbe.Interop.dll, Office.dll) will become unnecessary. |
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Bargholz Thomas
Posts: 242
Joined: 2006-12-18
| We had similar issues on multiple client computers (but far from all).
It seems to be related to an issue with the .NET framework after a Windows (or Office) update which started rolling out in may.
What have fixed it for us are either running the Microsoft .NET Framework Repair Tool, or applying this patch to .NET Framework: https://support.microsoft.com/da-dk/help/4503864/cumulative-update-for-net-framework-june-18-2019
Regards
Thomas |
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Andrei Smolin
Add-in Express team
Posts: 17797
Joined: 2006-05-11
| Hello Thomas,
Thank you for sharing this info!
Regards from Belarus (GMT+3),
Andrei Smolin
Add-in Express Team Leader |
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