how to fix cannot register assembly. System cannot find the file specified.

Question

how to fix cannot register assembly. System cannot find the file specified.

John Smith 0

I have the below error and have no idea how to resolve. I am attempting to setup a visual basic application under visual studio 2022 .net 8.0 which will be accessed from excel vba. Greatly appreciate any recommendations on how to resolve. MSB3217 Cannot register assembly "C:\Users\DeskTop-10\Documents\visual studio projects\MetaData_Extractor\MetaData_Extractor\bin\Debug\net8.0-windows10.0.22621.0\MetaData_Extractor.dll". Could not load file or assembly 'System.Runtime, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.

Viorel 122.5K Reputation points

2024-04-15T05:29:27.93+00:00

Did you also try to setup an application that is based on .NET Framework instead of .NET 8?
Tianyu Sun-MSFT 34,436 Reputation points Microsoft External Staff

2024-04-15T07:24:28.81+00:00

Hello @John Smith,

Welcome to Microsoft Q&A forum.

Perhaps some settings/rules have been changed in .NET/.NET Core and this causes the assembly failed to be registered.

How did you setup it in VS 2022? Did you refer to some documents(guidance)?
John Smith 0 Reputation points

2024-04-15T17:41:14.31+00:00

Application worked with .NET Framework 4.7.2. Under .NET 8 the build only fails when Register for COM interop is selected under Compile>General. Just built new pc and upgrade to windows 11 from windows 10 and installed visual studio 2022 which replaced visual studio 2019. I believe the setup was the same. At this point I just have no idea where to even begin looking.
Viorel 122.5K Reputation points

2024-04-15T18:18:38.27+00:00
Check some aspects:

https://learn.microsoft.com/en-us/dotnet/core/native-interop/expose-components-to-com

However, I think that it is still reasonable to use the .NET Framework instead of .NET.

1 answer

Your answer

Viorel 122.5K Reputation points

2024-04-15T05:29:27.93+00:00

Did you also try to setup an application that is based on .NET Framework instead of .NET 8?
Tianyu Sun-MSFT 34,436 Reputation points Microsoft External Staff

2024-04-15T07:24:28.81+00:00

Hello @John Smith,

Welcome to Microsoft Q&A forum.

Perhaps some settings/rules have been changed in .NET/.NET Core and this causes the assembly failed to be registered.

How did you setup it in VS 2022? Did you refer to some documents(guidance)?
John Smith 0 Reputation points

2024-04-15T17:41:14.31+00:00

Application worked with .NET Framework 4.7.2. Under .NET 8 the build only fails when Register for COM interop is selected under Compile>General. Just built new pc and upgrade to windows 11 from windows 10 and installed visual studio 2022 which replaced visual studio 2019. I believe the setup was the same. At this point I just have no idea where to even begin looking.
Viorel 122.5K Reputation points

2024-04-15T18:18:38.27+00:00

Check some aspects:

https://learn.microsoft.com/en-us/dotnet/core/native-interop/expose-components-to-com

However, I think that it is still reasonable to use the .NET Framework instead of .NET.

Answer 1

Tianyu Sun-MSFT 34,436 Microsoft External Staff

Hello @John Smith,

I notice that you mentioned "when Register for COM", not very sure, but is this thread helpful: Registering Assembly fails with error unable to resolve assembly? Perhaps the setup was not the same.

Kind Regards,

Tianyu

If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

Tianyu Sun-MSFT 34,436 Reputation points Microsoft External Staff

2024-04-30T01:51:47.5+00:00

Hello @John Smith,

We have not heard from you for a couple of days. May I know if you have checked the suggestions in the ticket which I shared above, and did it work?

Share via

how to fix cannot register assembly. System cannot find the file specified.

1 answer

Your answer