I am currently unable to start a new project , am getting the following error
C:\newApps>ionic start test blank
******************************************************
Dependency warning - for the CLI to run correctly,
it is highly recommended to install/upgrade the following:
Please install your Cordova CLI to version >=4.2.0 `npm install -g cordova`
******************************************************
Creating an Ionic 2.x app in C:\newApps\test based on the blank template.
Downloading: https://github.com/driftyco/ionic2-app-base/archive/master.zip
Downloading: https://github.com/driftyco/ionic2-starter-blank/archive/master.zip
Installing npm packages (may take a minute or two)...
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
C:\newApps>ionic start testApp blank
******************************************************
Dependency warning - for the CLI to run correctly,
it is highly recommended to install/upgrade the following:
Please install your Cordova CLI to version >=4.2.0 `npm install -g cordova`
******************************************************
Creating an Ionic 2.x app in C:\newApps\testApp based on the blank template.
Downloading: https://github.com/driftyco/ionic2-app-base/archive/master.zip
Error with start Error: UNKNOWN: unknown error, mkdir 'C:\newApps\testApp\ionic2
-app-base-master\resources\android\icon'
at Error (native)
at Object.fs.mkdirSync (fs.js:923:18)
at C:\Users\Emil Jenson\AppData\Roaming\npm\node_modules\ionic\node_modules\
adm-zip\util\utils.js:24:20
at Array.forEach (native)
at mkdirSync (C:\Users\Emil Jenson\AppData\Roaming\npm\node_modules\ionic\no
de_modules\adm-zip\util\utils.js:17:36)
at Object.makeDir (C:\Users\Emil Jenson\AppData\Roaming\npm\node_modules\ion
ic\node_modules\adm-zip\util\utils.js:53:13)
at C:\Users\Emil Jenson\AppData\Roaming\npm\node_modules\ionic\node_modules\
adm-zip\adm-zip.js:374:27
at Array.forEach (native)
at Object.extractAllTo (C:\Users\Emil Jenson\AppData\Roaming\npm\node_module
s\ionic\node_modules\adm-zip\adm-zip.js:372:26)
at Request._callback (C:\Users\Emil Jenson\AppData\Roaming\npm\node_modules\
ionic\node_modules\ionic-app-lib\lib\utils.js:133:11)
Error Initializing app: Error: UNKNOWN: unknown error, mkdir 'C:\newApps\testApp
\ionic2-app-base-master\resources\android\icon'
Error: UNKNOWN: unknown error, mkdir 'C:\newApps\testApp\ionic2-app-base-master
\resources\android\icon'
at Error (native)
at Object.fs.mkdirSync (fs.js:923:18)
at C:\Users\Emil Jenson\AppData\Roaming\npm\node_modules\ionic\node_modules\
adm-zip\util\utils.js:24:20
at Array.forEach (native)
at mkdirSync (C:\Users\Emil Jenson\AppData\Roaming\npm\node_modules\ionic\no
de_modules\adm-zip\util\utils.js:17:36)
at Object.makeDir (C:\Users\Emil Jenson\AppData\Roaming\npm\node_modules\ion
ic\node_modules\adm-zip\util\utils.js:53:13)
at C:\Users\Emil Jenson\AppData\Roaming\npm\node_modules\ionic\node_modules\
adm-zip\adm-zip.js:374:27
at Array.forEach (native)
at Object.extractAllTo (C:\Users\Emil Jenson\AppData\Roaming\npm\node_module
s\ionic\node_modules\adm-zip\adm-zip.js:372:26)
at Request._callback (C:\Users\Emil Jenson\AppData\Roaming\npm\node_modules\
ionic\node_modules\ionic-app-lib\lib\utils.js:133:11)
Your problem is probably with npm, something to do with permissions and files. This happens quite often and is almost impossible to successfully debug (at least here in the forum).
One solution: Uninstall your node, install nvm (or nvm-windows when you are using Windows), install a new node with this, then install ionic and cordova again and try your command again. The problem should be gone.