Error running remote compact task: unexpected status 404 Not Found... #38513

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1. RayCarnegie

   added

   appIssues related to the Codex desktop appIssues related to the Codex desktop app

   on Aug 14, 2026
2. github-actions

   added

   bugSomething isn't workingSomething isn't working

   extensionIssues related to the VS Code extensionIssues related to the VS Code extension

   contextIssues related to context management (including compaction)Issues related to context management (including compaction)

   connectivityIssues involving networking or endpoint connectivity problems (disconnections)Issues involving networking or endpoint connectivity problems (disconnections)

   on Aug 14, 2026
3. github-actions commented on Aug 14, 2026

   

   github-actionsBot

   on Aug 14, 2026 – with GitHub Actions

   Contributor

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   Potential duplicates detected. Please review them and close your issue if it is a duplicate.

   • Codex Desktop context compaction fails with /responses/compact 404 on Windows #38370
   • Codex CLI 0.146.0: /backend-api/codex/responses/compact returns 404 {"detail":"Not Found"} #38323
   • Random compaction bug blocking session completely. #38240

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4. SunMaple11 commented on Aug 14, 2026

   

   SunMaple11

   on Aug 14, 2026

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   I have solved this problem.
   ■ Error running remote compact task: unexpected status 404 Not Found: {"detail":"Not Found"}, url:
   https://chatgpt.com/backend-api/codex/responses/compact, cf-ray: a2a63697bb8ea0de-NRT, request id:
   39b24f5b-0bb3-4535-a643-d14319dcce5f
   This is my error
   It's 2 reasons I've known to cause it:
   1 codex version too old.
   2 some wrong configurations. This is my problem. Open ~/.codex/config.toml and search any wrong configurations.
   Because the remote compaction always error in the past so I add this config in my config.toml
   [feature]
   remote_compaction_v2 = false
   local_thread_store_compression = true
   It's wrong config. So I delete this three lines and continue my error session. It is work.
   Hope to help you.

   👍React with 👍4Reacted by Steen Petersen, xowny, Gloria Kim 은서 and Hansimov
5. thomoz

   added a commit that references this issue on Aug 22, 2026

   fix(chat): stop WhatsApp bot getting stuck on Codex's broken remote-c…

   ...

   2d55ed7
6. SteenPetersen commented on Aug 25, 2026

   

   SteenPetersen

   on Aug 25, 2026

   Last edited by SteenPetersen

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   EDIT: This did NOT fix the issue.

   I may have found another possible fix/workaround for this on Windows using Codex from Rider.

   Inspired by the last comment, I first checked:

   C:\Users<user>.codex\config.toml

   In my case, I did not have the settings mentioned above:

   [feature]
   remote_compaction_v2 = false
   local_thread_store_compression = true

   So there was nothing for me to remove/change there.

   What I did notice was that my globally installed Codex CLI was quite old:

   @openai/codex@0.125.0

   I updated the global installation, and I'm now on:

   codex-cli 0.149.1

   Since updating, I haven't hit the remote compact task: unexpected status 404 error again, and the session has already lasted considerably longer than it normally would before failing.

   I'm not 100% confident this is the fix yet, so I'll keep testing, but so far updating the Codex CLI looks promising.

   Might be worth checking codex --version if you're seeing the same issue, especially if you've had Codex installed for a while.

   EDIT: This did NOT fix the issue.

   👍React with 👍3Reacted by SunMaple, Nguyễn Việt Tùng and Steve Emmanuel
7. Hansimov commented on Sep 19, 2026

   

   Hansimov

   on Sep 19, 2026

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   Thanks @SunMaple11 ! Remove remote_compaction_v2 = false from config.toml really works for me.