Ansible Hosts

When I try playbook I see below error

ok: [resoxapp-ch2f-01c.email.comcast.net]

ERROR! the field ‘hosts’ is required but was not set

my inventory file

[hosts]

resoxapp-ch2f-01c.email.comcast.net

resoxapp-ch2f-02c.email.comcast.net

resoxui-ch2f-02c.email.comcast.net

resoxui-ch2f-01c.email.comcast.net

reshaproxy-ch2f-21c.email.comcast.net

Below is the playbook

See my answer here:

https://groups.google.com/forum/#!topic/ansible-devel/hzCOJJT9qyE

I see you’ve posted this the Development Ansible group too.
See my answer over there.