Unable to find an entry point named '?' in DLL 'PkgdefMgmt.dll' on Visual Studio 2017 (VS 2017)

Question

I'm getting the error:

Unable to find an entry point named '?' in DLL 'PkgdefMgmt.dll'

when installing a Visual Studio Extension (vsix) for VS 2017.

This extension was developed in VS2015, so i thought i'd upgrade, recompile, and reinstall it, but I get the same error.

This is a new laptop with Windows 10 and VS 2017.

Any ideas to fix?

Here's the complete install log:

5/9/2017 10:23:21 AM - Microsoft VSIX Installer 5/9/2017 10:23:21 AM - ------------------------------------------- 5/9/2017 10:23:21 AM - vsixinstaller.exe version: 5/9/2017 10:23:21 AM - 15.0.26403.7 built by: D15SVC 5/9/2017 10:23:21 AM - ------------------------------------------- 5/9/2017 10:23:21 AM - Command line parameters: 5/9/2017 10:23:21 AM - C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\Common7\IDE\VSIXInstaller.exe,C:\xxxxxxx\bin\Release\xxxxxx.vsix 5/9/2017 10:23:21 AM - ------------------------------------------- 5/9/2017 10:23:21 AM - Microsoft VSIX Installer 5/9/2017 10:23:21 AM - ------------------------------------------- 5/9/2017 10:23:21 AM - Failed to initialize settings for Isolated Shell C:\Program Files (x86)\Microsoft SQL Server\140\Tools\Binn\ManagementStudio\ssms.exe: Unable to find an entry point named '?' in DLL 'PkgdefMgmt.dll'. 5/9/2017 10:23:22 AM - Initializing Install... 5/9/2017 10:23:22 AM - Extension Details... 5/9/2017 10:23:22 AM - Identifier : XXXXX.XXXXXXX.XXXXXXXXXXXXXXXX.Company.XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX7acae2 5/9/2017 10:23:22 AM - Name : YYYYYYYYYY YYYYYYYY YYYY 5/9/2017 10:23:22 AM - Author : OOOOOOOOOO 5/9/2017 10:23:22 AM - Version : 5.0 5/9/2017 10:23:22 AM - Description : Empty VSIX Project. 5/9/2017 10:23:22 AM - Locale : en-US 5/9/2017 10:23:22 AM - MoreInfoURL
: 5/9/2017 10:23:22 AM - InstalledByMSI : False 5/9/2017 10:23:22 AM - SupportedFrameworkVersionRange : [4.5,) 5/9/2017 10:23:22 AM - 5/9/2017 10:23:22 AM - SignatureState : Unsigned 5/9/2017 10:23:22 AM - Supported Products : 5/9/2017 10:23:22 AM - Microsoft.VisualStudio.Community 5/9/2017 10:23:22 AM - Version : [14.0] 5/9/2017 10:23:22 AM - 5/9/2017 10:23:22 AM - References
: 5/9/2017 10:23:22 AM - ------------------------------------------------------- 5/9/2017 10:23:22 AM - Identifier : Microsoft.VisualStudio.MPF.14.0 5/9/2017 10:23:22 AM - Name : Visual Studio MPF 14.0 5/9/2017 10:23:22 AM - Version : [14.0] 5/9/2017 10:23:22 AM - MoreInfoURL : 5/9/2017 10:23:22 AM - Nested : No 5/9/2017 10:23:22 AM - 5/9/2017 10:23:22 AM - Signature Details... 5/9/2017 10:23:22 AM - Extension is not signed. 5/9/2017 10:23:22 AM - 5/9/2017 10:23:22 AM - Searching for applicable products... 5/9/2017 10:23:22 AM - Found installed product - Microsoft Visual Studio 2015 Shell (Integrated) 5/9/2017 10:23:22 AM - Found installed product - Global Location 5/9/2017 10:23:22 AM - Found installed product - Visual Studio Professional 2017 5/9/2017 10:23:22 AM - VSIXInstaller.NoApplicableSKUsException: This extension is not installable on any currently installed products. at VSIXInstaller.App.GetInstallableData(String vsixPath, Boolean isRepairSupported, IEnumerable1& skuData) at VSIXInstaller.App.Initialize(Boolean isRepairSupported) at VSIXInstaller.App.Initialize() at System.Threading.Tasks.Task1.InnerInvoke() at System.Threading.Tasks.Task.Execute()

Answer 1

Any ideas to fix?

If you want to run your extension on visual studio 2017, please upgrade your from extension manifest version 2 (VSIX v2) to the new version 3 VSIX manifest format (VSIX v3). for more information, please refer to:

https://learn.microsoft.com/en-us/visualstudio/extensibility/how-to-migrate-extensibility-projects-to-visual-studio-2017

If you want to build a VSIX v3 with Visual Studio 2015, You will also need to add the VsixType element specifying v3 to your project file:

<VsixType>v3</VsixType>

For more information, please refer to:

https://github.com/Microsoft/visualstudio-docs/blob/master/docs/extensibility/faq-2017.md#can-i-build-a-vsix-v3-with-visual-studio-2015

https://social.msdn.microsoft.com/Forums/vstudio/en-US/743061f9-98ea-4c22-881a-b144b0412cb8/can-i-build-a-vsix-v3-with-visual-studio-2015?forum=vsx