# Error Tryton Sao " Calling method resources on is not allowed"

**URL:** https://discuss.tryton.org/t/error-tryton-sao-calling-method-resources-on-is-not-allowed/2658
**Category:** User
**Created:** [April 29, 2020, 8:41pm UTC](https://discuss.tryton.org/t/error-tryton-sao-calling-method-resources-on-is-not-allowed/2658 "2020-04-29T20:41:31Z")
**Posts on this page:** 1
**Showing post:** 9

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### Author: ![pokoli](https://discuss-cdn.tryton.org/user_avatar/discuss.tryton.org/pokoli/32/22_2.png) [@pokoli](https://discuss.tryton.org/u/pokoli)
#### Post date: [May 1, 2020, 8:16am UTC](https://discuss.tryton.org/t/error-tryton-sao-calling-method-resources-on-is-not-allowed/2658/9 "2020-05-01T08:16:16Z")

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> [@Amitabh](#):
>
> I am using the latest version of sao , do you think i need to go back to version 5.0  
> because i tried with 5.0 previously and was getting the same error.

I’ve seen on your module list that you use the 4.6 series (which is unsuported). If you plan to use this version you should use the 4.6 sao series also. Server, clients and modules should alwasy be from the same series (first two digits of the version number).

As the 4.6 series is unsuported I will recomend updating your whole instalation to a more recent versions. Have a look at the [maintenance section of our release process](https://discuss.tryton.org/t/release-process/395).

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