Module version mismatch. Expected 48, got 47.

[jakubkratina]

Hello,

when I run dredd command I'm getting 'Module version mismatch. Expected 48, got 47.' error.

Node version is 6.1.0. and npm 3.8.6.

Complete error message:

module.js:568
  return process.dlopen(module, path._makeLong(filename));
                 ^

Error: Module version mismatch. Expected 48, got 47.
    at Error (native)
    at Object.Module._extensions..node (module.js:568:18)
    at Module.load (module.js:456:32)
    at tryModuleLoad (module.js:415:12)
    at Function.Module._load (module.js:407:3)
    at Module.require (module.js:466:17)
    at require (internal/module.js:20:19)
    at Object.<anonymous> (/usr/local/lib/node_modules/dredd/lib/dredd.js:11:15)
    at Module._compile (module.js:541:32)
    at Object.Module._extensions..js (module.js:550:10)

What should I do to fix this?

Thank you

[kylef]

This sounds like you've installed dredd and then upgraded or changed the version of node you are using. To solve this, you will need to reinstall dredd with the version of node you want to run it from.

$ npm install -g dredd

[jakubkratina]

Thank you for a quick answer. I have reinstalled the dredd and still not working, same error.

npm install -g dredd
/usr/local/bin/dredd -> /usr/local/lib/node_modules/dredd/bin/dredd
/usr/local/lib
└── dredd@1.0.11 

[honzajavorek]

I found a similar issue in the wild: mscdex/mmmagic#66 Could you please, @Wise007, try out the hints mentioned in the issue I linked? This really looks like problem with your setup, not with Dredd.

[jakubkratina]

@honzajavorek: Yeah, it is possible (a probably is) problem with my setup, but every command after upgrade works fine, except dredd. I'll try and post a response.

[jakubkratina]

So reinstallation of node and npm and it solved the problem. Thank you for your assistance. Great job with dredd.

[honzajavorek]

@Wise007 Thanks for praise and for sharing! I hope this issue helps anyone bumping into the same problem. I'm glad it works for you now 👍

[marshall-kapfudza]

I experienced the same issue, to resolve it I stated by checking my node version and I installed the node vision manager then I switched to the version $ nvm use 6

[asbjornu]

I'm seeing this although nvm says I'm using node v6.10.0:

$ nvm current
v6.10.0

I've also tried to reinstall dredd (leading to nodejs/node-gyp#942), without success.

[alexey-sh]

same error
node v6.10.0
npm 3.10.10

[honzajavorek]

@asbjornu @alexey-sh Did you try the solutions mentioned above? You could also give a try to the pure JS version to avoid compilation:

$ npm uninstall dredd
$ npm install dredd --no-optional