npm ERR! invalid: strip-ansi@0.2.2

[horaceho]

$ npm ls -g --verbose
npm info it worked if it ends with ok
npm verb cli [ 'node', '/usr/local/bin/npm', 'ls', '-g', '--verbose' ]
npm info using npm@1.4.23
npm info using node@v0.10.30
npm verb node symlink /usr/local/bin/node
/usr/local/lib
...
...
...
npm ERR! invalid: strip-ansi@0.2.2 /usr/local/lib/node_modules/npm/node_modules/columnify/node_modules/strip-ansi
npm verb exit [ 1, true ]
npm ERR! not ok code 0

[timoxley]

how did you "upgrade" npm?

[timoxley]

try this to restore npm:

npm install -g npm

[timoxley]

Actually, first can you paste the lines that you removed from the log output?

[horaceho]

@timoxley, I upgraded by $ npm update -g before. npm install -g npm fixed the issue. Thanks!