Unable to open up any file in my Visual studio project file, throws error: "Object reference not set to an instance of an object"

Question

I built the project (a csharp project with c++ interface.) I am able to open the files listed in the solution explorer. However, when I search any "words" that exist in the proeject, the finder does not retrieve correct results. Also, after closing the find tab, when I try to open any file in the project, it throws the error as mentioned. Also on the top bar in the IDE, I see this message.
"Visual Studio run into an unexpected problem, and may affect some project system functions. (Open log file)" I tried to delete temp folders as mentioned in this thread. Also rebooted the system., clean and rebuilt the solution again. But still I m seeing this error. Attaching the log file.

Using Microsoft Visual Studio Professional 2019

Version 16.11.42

dotNet Framework: 4.8.09037

Answer 1

Hi @Sivaraman, Ramkumar, 

Welcome to Microsoft Q&A! 

Have you tried to repair your VS2019? You can repair it with Visual Studio Installer > More > Repair. 

You can right-click your project node in the Solution Explorer > Unload Project > right-click your project again > Reload Project. 

If it doesn’t work, please enter “devenv /ResetSettings” at Developer Command Prompt to restore your Visual Studio default setting. 

Besides, you can create a new project and check if you have the same issue. 

Sincerely,

Anna

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