CODEWITHSUNDEEP
electronpouchdbleveldown
Jeevan
Jeevan

Reputation: 337

Electron with Pouchdb - unable to import leveldown

A dynamic link library (DLL) initialization routine failed. unable to import leveldown

Error: A dynamic link library (DLL) initialization routine failed.
\\?\(Project Folder)\node_modules\leveldown\build\Release\leveldown.node: unable to import leveldown
at requireLeveldown ((Project Folder)\node_modules\pouchdb\lib\index.js:6206:12)
at PouchDB$5.LevelDownPouch ((Project Folder)\node_modules\pouchdb\lib\index.js:6406:17)
at new PouchDB$5 ((Project Folder)\node_modules\pouchdb\lib\index.js:2732:36)
at database_init ((Project Folder)\index.js:102:12)
at App.app.on ((Project Folder)\index.js:58:2)
at emitTwo (events.js:111:20)
at App.emit (events.js:191:7)

Upvotes: 4

Views: 442

Answers (1)

kirogasa
kirogasa

Reputation: 949

I faced similar error when working with packages electron@2 and pouchdb-node@6.

App threw an error during load
Error: A dynamic link library (DLL) initialization routine failed.
\\?\D:\(Project Folder)\node_modules\leveldown\build\Release\leveldown.node
    at process.module.(anonymous function) [as dlopen] (ELECTRON_ASAR.js:166:20)
    ...

Also, for pouchdb-node@7, pouchdb-node@8 the error will look like this:

App threw an error during load
Error: A dynamic link library (DLL) initialization routine failed.
\\?\D:\(Project Folder)\node_modules\leveldown\prebuilds\win32-ia32\node.napi.node
    at process.module.(anonymous function) [as dlopen] (ELECTRON_ASAR.js:166:20)
    ...

And for pouchdb-node@9:

App threw an error during load
Error: A dynamic link library (DLL) initialization routine failed.
\\?\D:\(Project Folder)\node_modules\level\node_modules\leveldown\prebuilds\win32-ia32\node.napi.node
    at process.module.(anonymous function) [as dlopen] (ELECTRON_ASAR.js:166:20)
    ...

The problem here is that the leveldown (pouchdb-node package dependency) DLL does not match your environment.

Solution for me was to compile the native module for my environment using package electron-rebuild.
My environment:

Windows 10 64-bit
node 8.9.3 32-bit

My package.json:

{
  ...
  "scripts": {
    "postinstall": "electron-rebuild"
  },
  "dependencies": {
    "pouchdb-node": "^6.4.3"
  },
  "devDependencies": {
    "electron": "^2.0.18",
    "electron-rebuild": "^1.11.0"
  }
}

Result after command npm install:

> [email protected] install D:\(Project Folder)\node_modules\leveldown
> prebuild-install || node-gyp rebuild

> [email protected] postinstall D:\(Project Folder)\node_modules\electron
> node install.js

> (Project Name) postinstall D:\(Project Folder)
> electron-rebuild

√ Rebuild Complete

Note: electron-rebuild has requirements to work (for example: Python 2 in PATH), but that's a topic for another question. I will just give some commands here:

npm install --global --production [email protected]
npm install --global [email protected]
npm config set msvs_version 2017

Note: If you try to compile for pouchdb-node@9, there will be an error:

An unhandled error occurred inside electron-rebuild
...
d:\(Project Folder)\node_modules\leveldown\binding.cc(904): error C3861: 'napi_remove_env_cleanup_hook': identifier not found [D:\(Project Folder)\node_modules\leveldown\build\leveldown.vcxproj]
d:\(Project Folder)\node_modules\leveldown\binding.cc(915): error C3861: 'napi_add_env_cleanup_hook': identifier not found [D:\(Project Folder)\node_modules\leveldown\build\leveldown.vcxproj]
...

That's because the version of [email protected] (pouchdb-node@9 package dependency) use napi_add_env_cleanup_hook and napi_remove_env_cleanup_hook Node.js API features, introduced in Node.js v8.12.0, so the solution is to upgrade Electron to electron@3 that uses Node.js v10.2 underhood, unlike electron@2 which uses Node.js v8.9.

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Upvotes: 0

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