Sandbox was mandated, but no sandbox is available!

[sevonade4]

Error: Sandbox was mandated, but no sandbox is available!
at Q3e (file:///C:/Users/username/AppData/Roaming/npm/node_modules/@openai/codex/dist/cli.js:439:254)
at async EN (file:///C:/Users/username/AppData/Roaming/npm/node_modules/@openai/codex/dist/cli.js:437:5568)
at async Tte (file:///C:/Users/username/AppData/Roaming/npm/node_modules/@openai/codex/dist/cli.js:437:4863)
at async R0.handleFunctionCall (file:///C:/Users/username/AppData/Roaming/npm/node_modules/@openai/codex/dist/cli.js:461:3960)
at async R0.processEventsWithoutStreaming (file:///C:/Users/username/AppData/Roaming/npm/node_modules/@openai/codex/dist/cli.js:462:4719)
at async R0.run (file:///C:/Users/username/AppData/Roaming/npm/node_modules/@openai/codex/dist/cli.js:462:3045)

[tibo-openai]

Apologies, sandboxing is currently not supported on Windows. What was the command you ran?

[sevonade4]

I use o4-mini model and set the approval to full auto.

As for the prompt I told it to learn my codebase and then create a new directory and work on inside that directory.

[steven-forresttechnologies]

Can confirm the same error, codex was working on a dotnet 9 program without specifying full-auto just fine. Ran again with mode set to full-auto and repeatedly run into the same error :

Error: Sandbox was mandated, but no sandbox is available!
at Q3e.....

[jonchurch]

This was likely fixed by #261

Can you build from source and try again? It will be released likely today (not something I hav viz into)

This fix should opt out of sandbox on WIndows

[ishyv]

The error was not fixed, it crashes when trying to do anything regarding the codebase in Windows.

╭──────────────────────────────────────────────────────────────╮
│ ● OpenAI Codex (research preview) v0.1.2504161551            │
╰──────────────────────────────────────────────────────────────╯
╭──────────────────────────────────────────────────────────────╮
│ localhost session: 108c5e94758a4b3496f798f8d105bf26          │
│ ↳ workdir: C:\Users\Hyvnt\T\Rust\file-explorer               │
│ ↳ model: o4-mini                                             │
│ ↳ approval: full-auto                                        │
user
Try understanding this codebase

Error: Sandbox was mandated, but no sandbox is available!
    at Q3e (file:///C:/Users/Hyvnt/AppData/Roaming/npm/node_modules/@openai/codex/dist/cli.js:439:254)
    at async EN (file:///C:/Users/Hyvnt/AppData/Roaming/npm/node_modules/@openai/codex/dist/cli.js:437:5568)
    at async Tte (file:///C:/Users/Hyvnt/AppData/Roaming/npm/node_modules/@openai/codex/dist/cli.js:437:4863)
    at async R0.handleFunctionCall (file:///C:/Users/Hyvnt/AppData/Roaming/npm/node_modules/@openai/codex/dist/cli.js:461:3960)
    at async R0.processEventsWithoutStreaming (file:///C:/Users/Hyvnt/AppData/Roaming/npm/node_modules/@openai/codex/dist/cli.js:462:4719)
    at async R0.run (file:///C:/Users/Hyvnt/AppData/Roaming/npm/node_modules/@openai/codex/dist/cli.js:462:3045)

Node.js v22.13.1

[cravecra]

I saw sometimes codex pops up a wls terminal and process well but othera just sends this error

[jonchurch]

@cravecra what version are you reproing on? 0.1.2504172351?

And you're running from Windows directly, not inside WSL?

There must be a platform detection issue, you can see the codepaths here:

codex/codex-cli/src/utils/agent/handle-exec-command.ts

Lines 274 to 302 in 8e2e77f

	const isInLinux = async (): Promise<boolean> => {
	try {
	await access("/proc/1/cgroup");
	return true;
	} catch {
	return false;
	}
	};
	async function getSandbox(runInSandbox: boolean): Promise<SandboxType> {
	if (runInSandbox) {
	if (process.platform === "darwin") {
	return SandboxType.MACOS_SEATBELT;
	} else if (await isInLinux()) {
	return SandboxType.NONE;
	} else if (process.platform === "win32") {
	// On Windows, we don't have a sandbox implementation yet, so we fall back to NONE
	// instead of throwing an error, which would crash the application
	log(
	"WARNING: Sandbox was requested but is not available on Windows. Continuing without sandbox.",
	);
	return SandboxType.NONE;
	}
	// For other platforms, still throw an error as before
	throw new Error("Sandbox was mandated, but no sandbox is available!");
	} else {
	return SandboxType.NONE;
	}
	}

[Sunwood-ai-labs]

I encountered the following error when running Codex with the --full-auto option in a GitHub Actions Ubuntu environment:

Error: Sandbox was mandated, but no sandbox is available!
    at hOe (file:///usr/local/lib/node_modules/@openai/codex/dist/cli.js:468:433)
    at iO (file:///usr/local/lib/node_modules/@openai/codex/dist/cli.js:466:2281)
    at $ne (file:///usr/local/lib/node_modules/@openai/codex/dist/cli.js:466:1418)
    at dE.handleFunctionCall (file:///usr/local/lib/node_modules/@openai/codex/dist/cli.js:490:4648)
    at dE.processEventsWithoutStreaming (file:///usr/local/lib/node_modules/@openai/codex/dist/cli.js:492:3562)
    at dE.run (file:///usr/local/lib/node_modules/@openai/codex/dist/cli.js:491:3235)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async F$e (file:///usr/local/lib/node_modules/@openai/codex/dist/cli.js:789:516)
    at async file:///usr/local/lib/node_modules/@openai/codex/dist/cli.js:788:827

This appears to be similar to issues other users have reported. While this error has been primarily reported on Windows systems, I've confirmed it also occurs in Linux environments.

🔍 Debug Information

System Environment

Linux fv-az1336-138 6.11.0-1012-azure #12~24.04.1-Ubuntu SMP Mon Mar 10 19:00:39 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
PRETTY_NAME="Ubuntu 24.04.2 LTS"
VERSION_ID="24.04"

Node.js & Codex Information

Node.js: v20.19.1
Codex Version: 0.1.2504301751

Sandbox Related

/proc/1/cgroup file: ✅ Exists

0::/init.scope

[christopherok]

This appears to be similar to issues other users have reported.
I encountered the following error when running Codex with the --dangerously-auto-approve-everything and --approval-mode full-auto on windows WSL2.

Error: Sandbox was mandated, but no sandbox is available!
at hOe (file:///home/chris/.nvm/versions/node/v22.14.0/lib/node_modules/@openai/codex/dist/cli.js:468:433)
at iO (file:///home/chris/.nvm/versions/node/v22.14.0/lib/node_modules/@openai/codex/dist/cli.js:466:2281)
at $ne (file:///home/chris/.nvm/versions/node/v22.14.0/lib/node_modules/@openai/codex/dist/cli.js:466:1418)
at dE.handleFunctionCall (file:///home/chris/.nvm/versions/node/v22.14.0/lib/node_modules/@openai/codex/dist/cli.js:490:4648)
at dE.processEventsWithoutStreaming (file:///home/chris/.nvm/versions/node/v22.14.0/lib/node_modules/@openai/codex/dist/cli.js:492:3562)
at dE.run (file:///home/chris/.nvm/versions/node/v22.14.0/lib/node_modules/@openai/codex/dist/cli.js:491:3235)
at process.processTicksAndRejections (node:internal/process/task_queues:105:5)

🔍 Debug Information
System Environment
Linux windoze 5.15.167.4-microsoft-standard-WSL2 #1 SMP Tue Nov 5 00:21:55 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux
PRETTY_NAME="Ubuntu 24.04.2 LTS"
VERSION_ID="24.04"

Node.js & Codex Information
Node.js: v22.14.0
Codex Version: 0.1.2504301751

[rous100]

Same exact issue on WSL2, Codex CLI 0.1.2504301751

model: o4-mini
approval: full-auto

Error: Sandbox was mandated, but no sandbox is available!
    at hOe (file:///home/user/.nvm/versions/node/v22.15.0/lib/node_modules/@openai/codex/dist/cli.js:468:433)
    at iO (file:///home/user/.nvm/versions/node/v22.15.0/lib/node_modules/@openai/codex/dist/cli.js:466:2281)
    at $ne (file:///home/user/.nvm/versions/node/v22.15.0/lib/node_modules/@openai/codex/dist/cli.js:466:1418)
    at dE.handleFunctionCall (file:///home/user/.nvm/versions/node/v22.15.0/lib/node_modules/@openai/codex/dist/cli.js:490:4648)
    at dE.processEventsWithoutStreaming (file:///home/user/.nvm/versions/node/v22.15.0/lib/node_modules/@openai/codex/dist/cli.js:492:3562)
    at dE.run (file:///home/user/.nvm/versions/node/v22.15.0/lib/node_modules/@openai/codex/dist/cli.js:491:3235)
    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)

[fezsid]

I face the same issue on linux

[ArchSenex]

Yeah, I was running just fine earlier, got an update notice and took it, and now getting "Error: Sandbox was mandated, but no sandbox is available!" on latest. Windows with WSL Ubuntu 24.04.2 LTS. Hadn't had this problem since I started using Codex last week. Rolled back to v0.1.2504172351 and issue seems to have gone away

[Vermath]

I'm getting a similar issue.

Here's what prints in console:

file:///home/[user]/.nvm/versions/node/v22.15.0/lib/node_modules/@openai/codex/dist/cli.js:468 STDERR: ${A}),{stdout:f,stderr:A,exitCode:h,durationMs:d}}var AOe=oO.access(a4,oO.constants.X_OK).then(()=>!0,e=>(["ENOENT","ACCESS","EPERM"].includes(e.code)||jt(Unexpected error for \stat ${a4}`: ${e.message}),!1));async function hOe(e){if(e){if(process.platform==="darwin"){if(await AOe)return"macos.seatbelt";throw new Error("Sandbox was mandated, but 'sandbox-exec' was not found in PATH!")}else if(iR)return"none";throw new Error("Sandbox was mandated, but no sandbox is available!")}else return"none"}async function qne(e,t,r){let{review:n,customDenyMessage:a}=await r(e.cmd,t);if(n==="always"){let i=Wne(e.cmd);Vne.add(i)}if(n==="explain")return null;if(n!=="yes"&&n!=="always"){let i=n==="no-continue"?a?.trim()||"No, don't do that \u2014 keep going though.":"No, don't do that \u2014 stop for now.";return{outputText:"aborted",metadata:{},additionalItems:[{type:"message",role:"user",content:[{type:"input_text",text:i}]}]}}else return null}import{randomUUID as Uke}from"node:crypto";m();m();m();var o4="RFC3986",s4={RFC1738:e=>String(e).replace(/%20/g,"+"),RFC3986:e=>String(e)},Kne="RFC1738";m();m();var EOe=Array.isArray,Sd=(()=>{let e=[];for(let t=0;t<256;++t)e.push("%"+((t<16?"0":"")+t.toString(16)).toUpperCase());return e})();var sO=1024,jne=(e,t,r,n,a)=>{if(e.length===0)return e;let i=e;if(typeof e=="symbol"?i=Symbol.prototype.toString.call(e):typeof e!="string"&&(i=String(e)),r==="iso-8859-1")return escape(i).replace(/%u[0-9a-f]{4}/gi,function(c){return"%26%23"+parseInt(c.slice(2),16)+"%3B"});let o="";for(let c=0;c<i.length;c+=sO){let d=i.length>=sO?i.slice(c,c+sO):i,f=[];for(let A=0;A<d.length;++A){let 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^

Error: Sandbox was mandated, but no sandbox is available!
at hOe (file:///home/[user]/.nvm/versions/node/v22.15.0/lib/node_modules/@openai/codex/dist/cli.js:468:433)
at iO (file:///home/[user]/.nvm/versions/node/v22.15.0/lib/node_modules/@openai/codex/dist/cli.js:466:2281)
at $ne (file:///home/[user]/.nvm/versions/node/v22.15.0/lib/node_modules/@openai/codex/dist/cli.js:466:1418)
at dE.handleFunctionCall (file:///home/[user]/.nvm/versions/node/v22.15.0/lib/node_modules/@openai/codex/dist/cli.js:490:4648)
at dE.processEventsWithoutStreaming (file:///home/[user]/.nvm/versions/node/v22.15.0/lib/node_modules/@openai/codex/dist/cli.js:492:3562)
at dE.run (file:///home/[user]/.nvm/versions/node/v22.15.0/lib/node_modules/@openai/codex/dist/cli.js:491:3235)
at process.processTicksAndRejections (node:internal/process/task_queues:105:5)`

Hope this contribution helps! I normally get this about once a day, and it's inconsistent. It often occurs after I've loaded in a bunch of context for the model to understand before it gets to work, or it reads a particularly long sequence of code.