Anyone know why I would get this error when trying to create a grails app using terminal. 

```
mycomputer:test-apps mailboxe$ grails create-app demo
| Configuring classpath
| Error Error executing script CreateApp: /Users/bla/.grails/ivy-cache/resolved-org.grails.internal-grails-2.0.3.xml (Permission denied) (Use --stacktrace to see the full trace)

```