Reply: devenv.exe is an important DLL file of Microsoft Visual Studio. For system errors caused by devenv.exe, you can try to do this:

1. Initialize Microsoft Visual Studio software and restore default values

Enter the initialization command in cmd:

devenv /resetsettings or devenv.exe /resetuserdata

You can also initialize VS by setting:

In VS-Tools-Import and Export Tools-Reset all settings

2. Header files and libraries conflict, that is, related include files or library files conflict. This is the reason that many people often encounter. The solution is to delete the unnecessary "include directory" and "library directory" paths

3. If the path of OpenCV is configured, the devenv.exe application error occurs after creating other projects. The solution is to go to "Properties Manager" - "Microsoft.cpp.Win32.user" - "VC ++ Directory" - "Include Directory" and "Library Directory", remove the OpenCV directory (or remove unused paths) to avoid conflicts in header files.