fenris@macbuntu:~$ juju switch hpcloud
rackspace -> hpcloud

fenris@macbuntu:~$ juju status --show-log
2015-08-01 22:32:35 INFO juju.cmd supercommand.go:37 running juju [1.24.3-wily-i386 gc]
2015-08-01 22:32:35 INFO juju.provider.openstack provider.go:243 opening environment "hpcloud"
2015-08-01 22:32:59 ERROR juju.cmd supercommand.go:430 Unable to connect to environment "hpcloud".
Please check your credentials or use 'juju bootstrap' to create a new environment.

Error details:
instances not found