# playbook with dynamic variable interpolation doesn't work in ansible tower v2.4.5, any help with this?

**URL:** <https://forum.ansible.com/t/playbook-with-dynamic-variable-interpolation-doesnt-work-in-ansible-tower-v2-4-5-any-help-with-this/23132>\
**Category:** Ansible Project\
**Created:** [November 30, 2016, 2:21am UTC](https://forum.ansible.com/t/playbook-with-dynamic-variable-interpolation-doesnt-work-in-ansible-tower-v2-4-5-any-help-with-this/23132 "2016-11-30T02:21:06Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![rob2](https://avatars.discourse-cdn.com/v4/letter/r/f9ae1b/32.png) [@rob2](https://forum.ansible.com/u/rob2)\
**Post date:** [November 30, 2016, 2:21am UTC](https://forum.ansible.com/t/playbook-with-dynamic-variable-interpolation-doesnt-work-in-ansible-tower-v2-4-5-any-help-with-this/23132/1 "2016-11-30T02:21:06Z")

</div>

reference: [http://docs.ansible.com/ansible/faq.html#when-should-i-use-also-how-to-interpolate-variables-or-dynamic-variable-names](http://docs.ansible.com/ansible/faq.html#when-should-i-use-also-how-to-interpolate-variables-or-dynamic-variable-names)

I have a playbook working fine via cli, however I am unable to figure why I cannot dynamically interpolate when running through tower. Statically is working fine.

I’m referencing the “vars” dict. to access data from a vars file via include\_vars task.

vars[‘VALUE’] works to verify the data struct

vars[myvar | upper] does not. myvar being another variable set during the play.

any ideas?