Hi,

I have started to receive notifications from Heroku that my stack (Heroku-18) is deprecated. 

The instructions that Heroku provides for upgrading are close to incomprehensible for me -- I use oTree hub precisely so I don't have to deal with the heroku backend. 

Is there any way to handle the upgrade via oTree Hub?

Thanks,

Evan

Hi, thanks for raising this! I investigated a bit. I'll make sure to manage the auto-upgrade before Feb 2023, which is the deadline for making the upgrade. For now you can continue as usual and your builds will be fine.

No worries. Thanks!

Is there an update on this topic? I am getting alert messages too

Can you show the alert you are getting?

Your recently built app decision-experiment is using the Heroku-18 stack, which is deprecated.
Since February 1st, 2023, the first build of each Heroku-18 app within a 7-day period has been failing with a deprecation notice.
From April 1st, 2023, the frequency of these failures will increase to the first build of each app per day.
On April 30th, 2023, Heroku-18 reaches end-of-life; apps using it will no longer receive security updates, and be run at your own risk.
From May 1st, 2023, builds will no longer be allowed for Heroku-18 apps.
Please upgrade to a newer stack as soon as possible.
See the Heroku-18 End-Of-Life FAQ for more details.

This was an email you received?

Are you deploying through oTree Hub? When you build the app, oTree Hub should be displaying a message like this which gives the instructions on how to fix it:

        You can fix this error by upgrading oTree.
        Or, if you need to use an older oTree version, 
        then install the Heroku CLI and run this command: "heroku stack:set heroku-20 --app YOUR-SITE-NAME"

Yes, that is an email. I am using oTree Hub but I get no message from there. I uploaded and it gave me an error that said I should contact you then uploaded again and it worked but I received that email. 

DOes it matter what otree I have if I am using otree hub? if yes What should I do to upgrade my app?

Thanks 
David Campoverde

Yes, that is an email. I am using oTree Hub but I get no message from there. I uploaded and it gave me an error that said I should contact you then uploaded again and it worked but I received that email. 

DOes it matter what otree I have if I am using otree hub? if yes What should I do to upgrade my app?

Thanks 
David Campoverde

Hi,

I am also getting this email. What version of otree should I be using? Currently I am using otree==5.6.0

Thank you,
Mouli Modak

At least version 5.9.2. Latest version preferred.

Hi Chris,

I developed my app in Otree 3.3 before and found the deprecation problem with Heroku. I tried to upgrade my Otree, but it should dj_database_url not found. Since Heroku is going to stop 18-stack soon, could you give some advice on my problem?

I deploy through OTree Hub and I'm developing with 5.10.2, but I'm getting the "Your app's stack is approaching end-of-life (Heroku-18) emails.

I am not prompted with 
        You can fix this error by upgrading oTree.
        Or, if you need to use an older oTree version,
        
What should I do?

I investigated a bit more. For all of you getting these warnings, it is necessary for you to upgrade the stack of your apps via the dashboard.

Go to:
https://dashboard.heroku.com/

It will list each app's stack. Click on each app with heroku-18, and in the "settings" section there is a big button to upgrade the stack.