ERROR: run_once is not a legal parameter in an Ansible task or handler

Hi,

run_once is still not working for me

ansible --version
ansible 1.7

Enter code here...---

  • name: Freeze zones
    command: rndc freeze
    run_once: true
    delegate_to: “IXPDNS01”

  • name: Thaw zones
    command: rndc thaw
    run_once: true
    delegate_to: “IXPDNS01”

any ideas,
Paul Morrison