Start new project on RC0 fails

Just tried to follow upgrade instructions.
Node6 and npm3 is installed i uninstalled and installed ionic but still receive the following (unchanged) error when starting the project

Creating Ionic app in folder /projects/e-pos/epos-service based on tabs project
Downloading: https://github.com/driftyco/ionic2-app-base/archive/master.zip
[=============================] 100% 0.0s
Downloading: https://github.com/driftyco/ionic2-starter-tabs/archive/master.zip
[=============================] 100% 0.0s
Installing npm packages…
Error with start undefined
Error Initializing app: There was an error with the spawned command: npminstall
There was an error with the spawned command: npminstall
Caught exception:
undefined

Please help :slight_smile: