# ansible tower - invalid reference format

**URL:** <https://forum.ansible.com/t/ansible-tower-invalid-reference-format/36356>\
**Category:** AWX Project\
**Tags:** aap\
**Created:** [February 22, 2022, 4:40pm UTC](https://forum.ansible.com/t/ansible-tower-invalid-reference-format/36356 "2022-02-22T16:40:52Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Bill\_Nolf](https://avatars.discourse-cdn.com/v4/letter/b/a9adbd/32.png) [@Bill\_Nolf](https://forum.ansible.com/u/Bill_Nolf)\
**Post date:** [February 22, 2022, 4:40pm UTC](https://forum.ansible.com/t/ansible-tower-invalid-reference-format/36356/1 "2022-02-22T16:40:52Z")

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I trying to run the demo template (job) in ansible tower 4.1 but it won’t run. I get the following error: Invalid reference format. This is a trial version of the ansible automation platform and I don’t have Red Hat support. Has anybody seen this before and any ideas how to fix it. thanks

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**Author:** ![kdelee](https://sea1.discourse-cdn.com/ansible/user_avatar/forum.ansible.com/kdelee/32/193_2.png) [@kdelee](https://forum.ansible.com/u/kdelee)\
**Post date:** [February 23, 2022, 9:09pm UTC](https://forum.ansible.com/t/ansible-tower-invalid-reference-format/36356/2 "2022-02-23T21:09:20Z")

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Check the configuration of the default execution environment. I am pretty sure that error you are seeing comes from podman when it doesn’t like the format the image is in.