MSVCP140 should not be needed

[artknight]

Hi,
I am getting this error Error: This version of µWS is not compatible with your Node.js build: after upgrading to 20.6.0.

I am running node v14.17.0

What is the new node version requirement?

[e3dio]

Node 14 to 17

[artknight]

Node 14 to 17

So, node 14.17.0 should have worked then? Why didn't it?

[e3dio]

You can check each variable in this line https://github.com/uNetworking/uWebSockets.js/blob/binaries/uws.js#L20 process.platform process.arch process.versions.modules for your Node process, and make sure the matching binary is here https://github.com/uNetworking/uWebSockets.js/tree/binaries

[artknight]

@e3dio here is the system dump

process {
  version: 'v16.13.2',
  versions: {
    node: '16.13.2',
    v8: '9.4.146.24-node.14',
    uv: '1.42.0',
    zlib: '1.2.11',
    brotli: '1.0.9',
    ares: '1.18.1',
    modules: '93',
    nghttp2: '1.45.1',
    napi: '8',
    llhttp: '6.0.4',
    openssl: '1.1.1l+quic',
    cldr: '39.0',
    icu: '69.1',
    tz: '2021a',
    unicode: '13.0',
    ngtcp2: '0.1.0-DEV',
    nghttp3: '0.1.0-DEV'
  },
  arch: 'x64',
  platform: 'win32',
  release: {
    name: 'node',
    lts: 'Gallium',
    sourceUrl: 'https://nodejs.org/download/release/v16.13.2/node-v16.13.2.tar.gz',
    headersUrl: 'https://nodejs.org/download/release/v16.13.2/node-v16.13.2-headers.tar.gz',
    libUrl: 'https://nodejs.org/download/release/v16.13.2/win-x64/node.lib'
  },

this file ./uws_win32_x64_93.node definitely exists, just checked

[e3dio]

I am running node v14.17.0

That says Node 16, you said Node 14. You should also confirm what version uWS.js you are running, check the node_modules/uWebSockets.js/package.json file and see what version it says

[artknight]

I am running node v14.17.0

That says Node 16, you said Node 14. You should also confirm what version uWS.js you are running, check the node_modules/uWebSockets.js/package.json file and see what version it says

yes, i upgraded after you mentioned that its between 14-17

[artknight]

{
  "name": "uWebSockets.js",
  "version": "20.6.0",
  "main": "uws.js",
  "types": "./index.d.ts"
}

[e3dio]

So it should be working for you, I can confirm Node 17 is working for the same system as yours, I don't have Node 16 set up to check

[artknight]

ok lemme upgrade to 17

[artknight]

@e3dio yeah that did not fix it.. Here is the actual error

D:\web\ws.cogency.io\node_modules\uWebSockets.js\uws.js:22
                throw new Error('This version of µWS is not compatible with your Node.js build:\n\n' + e.toString());
                ^

Error: This version of µWS is not compatible with your Node.js build:

Error: The specified module could not be found.
\\?\D:\web\example.com\node_modules\uWebSockets.js\uws_win32_x64_102.node
    at D:\web\example.com\node_modules\uWebSockets.js\uws.js:22:9
    at Object.<anonymous> (D:\web\example.com\node_modules\uWebSockets.js\uws.js:24:3)
    at Module._compile (node:internal/modules/cjs/loader:1097:14)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1149:10)
    at Module.load (node:internal/modules/cjs/loader:975:32)
    at Function.Module._load (node:internal/modules/cjs/loader:822:12)
    at Module.require (node:internal/modules/cjs/loader:999:19)
    at require (node:internal/modules/cjs/helpers:102:18)
    at Object.<anonymous> (D:\web\example.com\app.js:2:13)
    at Module._compile (node:internal/modules/cjs/loader:1097:14)

Node.js v17.3.1

looks like the uws_win32_x64_102.node is not being found.. however it is there!

Also, not sure if this matters, I had v19.3.0 running successfully before the upgrade

[e3dio]

I see some things for Windows error "The specified module could not be found" for it not finding a DLL that it assumes to be there https://stackoverflow.com/questions/13471457/finding-dll-for-the-specified-module-could-not-be-found You could run Process Monitor and check for the error as described in link

[e3dio]

console.log(process.pid)
setTimeout(()=>require('uWebSockets.js'),15000)

Run that code, in Process Monitor add filter on that Process ID and start capturing events, then the module will try to load and look for error towards the end

[artknight]

@e3dio Ok, I got it resolved! Here is what I did

1. To check for missing dependencies, I downloaded the dependecy checker https://github.com/lucasg/Dependencies

2. Once downloaded, I ran it on the uws_win32_x64_102.node module to determine if any dependencies were missing.

Indeed, three files needed to be downloaded

MSVCP140.dll
VCRUNTIME140.dll
VCRUNTIME140_1.dll

3. The files are a part of the Visual Studio runtime env, so it really depends on how the node modules were compiled. In this case just downloading the packages was sufficient

https://aka.ms/vs/17/release/vc_redist.x86.exe
https://aka.ms/vs/17/release/vc_redist.x64.exe

After installing and rebooting the server, the dependencies were found and I was able to run the WS server!

... just in case this helps someone =)

[e3dio]

I was going to say, looks like those 3 DLL were required

[ghost]

https://docs.microsoft.com/en-us/cpp/build/reference/md-mt-ld-use-run-time-library?view=msvc-170#remarks