· Nov 27, 2021

VSCode can't start InterSystems Language Server

Hi, I have VSCode on my Windows 10 notebook with intersystems-community.objectscript-pack installed. I'm successfully connected to remote IRIS (2021.1). I can export classes, change them, save and import back to IRIS. 

But every time VSCode starts, the message "Request initialize failed with message: Dynamic Linking Error: Win32 error 126" is displayed and InterSystems Language Server does not start.

Has anyone solved this problem yet?

Product version: IRIS 2021.1
$ZV: IRIS for UNIX (Ubuntu Server LTS for x86-64) 2021.1 (Build 215.3U) Wed Oct 27 2021 17:38:43 EDT
Discussion (5)1
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I think same issue as .

@pvdmm Thanks for the log, I think that your problem is due to a couple of missing DLLs: msvcp120.dll and msvcr120.dll

These can be installed using the Visual C++ 2013 redistributable package available from

This is a link to an page talking about a bugfix update but it is the latest version (5) of these tools, linked from a Microsoft page titled "The latest supported Visual C++ downloads".

Please install this and then try running VSCode again.

If this fixes your problem the Language Server team can work out the best way to fix this issue for future installations of the extension.