NPM global install cannot find module

Question

I wrote a module which I published to npm a moment ago  https   npmjs org package wisp   So it installs fine from the command line     npm i -g wisp  However  when I run it from the command line  I keep getting an error that optimist isn t installed     wisp  Error  Cannot find module  optimist      at Function Module  resolveFilename  module js 338 15      at Function Module  load  module js 280 25      at Module require  module js 362 17      at require  module js 378 17      at Object  lt anonymous gt    usr local lib node modules wisp wisp 12 10      at Object  lt anonymous gt    usr local lib node modules wisp wisp 96 4      at Module  compile  module js 449 26      at Object exports run   usr local lib node modules coffee-script lib coffee-script coffee-script js 68 25      at compileScript   usr local lib node modules coffee-script lib coffee-script command js 135 29      at fs stat notSources  anonymous function    usr local lib node modules coffee-script lib coffee-script command js 110 18    However  I have specified in package json as a dependancy        name    wisp      author    Brendan Scarvell  lt bscarvell gmail com gt       version    0 1 0      description    Global nodejs file server      dependencies          optimist     0 3 4          repository    git   github com tehlulz wisp      bin          wisp       wisp          Does anyone know what to do to get this running  I know its to do with the bin part adding the executable to bin and the node modules in that directory being empty  No idea how to resolve this

User · Answer

In my case both node and npm were in same path   usr bin   The NODE PATH was empty  so the npm placed the global modules into  usr lib node modules where require      successfully find them  The only exception was the npm module  which came with the nodejs package  Since I m using 64 bit system  it was placed into  usr lib64 node modules  This is not where require      searches in case of empty NODE PATH and node started from  usr bin  So I had two options    link  usr lib64 node modules npm to  usr lib node modules npm move modules from  usr lib node modules   to  usr lib64 node modules  and set NODE PATH  usr lib64 node modules   Both worked  I m using OpenSUSE 42 1 and the nodejs package from updates repository  Version is 4 4 5

User · Answer

vim  etc profile d nodejs sh  NODE PATH  usr lib nodejs  usr lib node modules  usr share javascript export NODE PATH   NODE PATH

User · Answer

For Windows  from Nodejs cannot find installed module on Windows  what worked for me is running npm link as in  npm link wisp

User · Answer

add this to beginning of prog mac    module paths push   usr local lib node modules

User · Answer

For anyone else running into this  I had this problem due to my npm installing into a location that s not on my NODE PATH    root uberneek     which npm  opt bin npm  root uberneek     which node  opt bin node  root uberneek     echo  NODE PATH   My NODE PATH was empty  and running npm install --global --verbose promised-io showed that it was installing into  opt lib node modules promised-io    root uberneek     npm install --global --verbose promised-io npm info it worked if it ends with ok npm verb cli     opt bin node   npm verb cli     opt bin npm   npm verb cli    install   npm verb cli    --global   npm verb cli    --verbose   npm verb cli    promised-io    npm info using npm 1 1 45 npm info using node v0 8 4  cut  npm info build  opt lib node modules promised-io npm verb from cache  opt lib node modules promised-io package json npm verb linkStuff   true    opt lib node modules   true    opt lib node modules     cut    My script fails on require  promised-io promise      neek uberneek project   node buildscripts stringsmerge js   module js 340     throw err              Error  Cannot find module  promised-io promise      at Function Module  resolveFilename  module js 338 15    I probably installed node and npm from source using configure --prefix  opt   I ve no idea why this has made them incapable of finding installed modules   The fix for now is to point NODE PATH at the right directory   export NODE PATH  opt lib node modules   My require  promised-io promise   now succeeds

User · Answer

Had the same problem on one of the test servers running Ubuntu under root  Then created a new user using useradd -m myuser and installed everything  nvm  node  packages  as myuser  Now it s working fine

User · Answer

I had to add C  Users  Username  AppData Roaming npm to my env variables and then i could install stuff

User · Answer

I did this in simple way      Un-Install node from control panel  Windows 7  Install node again Install protractor npm install --global --verbose protractor Update web driver manager    works fine for me   Hope this helps you

User · Answer

I got the  optimist  module error and I just did  npm install  to resolve it  went past that error   https   github com mbloch mapshaper issues 12

User · Answer

For some  like me  that nothing else worked  try this   brew cleanup brew link node brew uninstall node brew install node   Hope it helps someone

User · Answer

On windows if you just did a clean install and you get this you need blow away your npm cache in  AppData Roaming

User · Answer

I had the same error as the OP  but digging through the logs I could see sh  node  command not found   It turns out that the  usr bin node program  symlink  is no longer installed with apt install nodejs    Once symlinked  usr bin node  tonodejs npm install -g  angular cli  succeeded   The proper way to install this on debian is apt install nodejs-legacy

User · Answer

I have just met this problem of the axios module  Then I tried this  run rm -rf node modules and yarn  And it works

User · Answer

I got this error Error  Cannot find module  number-is-nan  whereas the module actually exists  It was due to a bad incomplete Node js installation   For Windows   as other answers suggest it  you need a clean Node installation     Uninstall Node js Delete the two folders npm and npm cache in C  Users user AppData Roaming Restart Windows and install Node js Run npm initor  npm init --yes for default config  Set the Windows environment variable for NODE PATH  This path is where your packages are installed  It s probably something likeNODE PATH   C  Users user node modules or C  Users user AppData Roaming npm node modules Start a new cmd console and npm should work fine   Note     Try the last points before reinstalling Node js  it could save you some time and avoid to re-install all your packages

User · Answer

For Mac User s It s Best use the manual installation      To minimize the chance of permissions errors  you can configure npm to   use a different directory  In this example  it will be a hidden   directory on your home folder          Back-up your computer before you start    Make a directory for global installations       mkdir    npm-global   Configure npm to use the new directory path       npm config set prefix     npm-global    Open or create a    profile file and add this line       export PATH    npm-global bin  PATH   Back on the command line  update your system variables       source    profile   Test  Download a package globally without using sudo       npm install -g jshint         Instead of steps 2-4  you can use the corresponding ENV variable  e g    if you don t want to modify    profile    NPM CONFIG PREFIX    npm-global    Reference   https   docs npmjs com getting-started fixing-npm-permissions

User · Answer

The following generic fix would for any module  For example with request-promise  Replace   npm install request-promise --global   With   npm install request-promise --cli   worked  source  and also for globals and inherits  Also  try setting the environment variable  NODE PATH  AppData  npm node modules

User · Answer

By default node does not look inside the  usr local lib node module for loading global modules  Refer the module loading explained in http   nodejs org api modules html modules loading from the global folders  So either you have to  1 add the  usr local lib node module to NODE PATH and export it  or  2 copy the installed node modules to  usr local lib node    As explained in the link for loading module node will search in this path and will work

[node.js] NPM global install "cannot find module"

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