# Attribute Error with postgis backend

**URL:** https://discuss.tryton.org/t/attribute-error-with-postgis-backend/1589
**Category:** User
**Created:** [July 18, 2019, 3:28pm UTC](https://discuss.tryton.org/t/attribute-error-with-postgis-backend/1589 "2019-07-18T15:28:43Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![Jackelin](https://discuss-cdn.tryton.org/letter_avatar_proxy/v4/letter/j/b9bd4f/32.png) [@Jackelin](https://discuss.tryton.org/u/Jackelin)
#### Post date: [July 18, 2019, 3:28pm UTC](https://discuss.tryton.org/t/attribute-error-with-postgis-backend/1589/1 "2019-07-18T15:28:43Z")

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i have uri = postgis://postgres:admin@localhost:5432/

but now i have other error I dont understand why?

 ![Upper_error](https://discuss-cdn.tryton.org/uploads/default/original/1X/23ecaf00516ff4a5eeae33e9856a56d532d9f3d1.png)

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### Author: ![ced](https://discuss-cdn.tryton.org/user_avatar/discuss.tryton.org/ced/32/1237_2.png) [@ced](https://discuss.tryton.org/u/ced)
#### Post date: [July 18, 2019, 3:37pm UTC](https://discuss.tryton.org/t/attribute-error-with-postgis-backend/1589/2 "2019-07-18T15:37:55Z")

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You do not seem to use a version with the fix: [cannot reload trytond\_gis dependant module (#7900) · Issues · Tryton / Tryton · GitLab](https://bugs.tryton.org/issue7900)