Good call on the, "you also need." I updated it.

The error happens regardless of whether Karma is already installed globally and locally. It's not a PATH issue. Can't call it from a bat file without a cli. You need the karma-cli for a clean fix.

This issue has hit quite a few people. See stack overflow below.

http://stackoverflow.com/questions/20800933/running-karma-after-installation-results-in-karma-is-not-recognized-as-an-inte