---
# @generated by sylphx-gen 0.1.0 from contracts@e145cc7cf1bc9605f2b27439e5e17ed76a1a2fd7e7021906a013f7565e4a0cd5. Do not edit.
title: "CONTROL_HELD"
description: "CONTROL_HELD (FAILED_PRECONDITION, HTTP 409): Another holder has input control of the display."
type: reference
product: platform
summary: "Another holder has input control of the display."
updated: 2026-09-28
nav: false
---

Another holder has input control of the display.

**HTTP** 409 · **gRPC** `FAILED_PRECONDITION` · [the error body](/docs/platform/errors)

## Returned by

| Method | Scope | What it does |
| --- | --- | --- |
| [`sandboxes.leases.act`](/docs/api/leases/act) | `sandboxes:exec` | Performs computer actions on a DESKTOP, BROWSER, or ANDROID lease, in order, and returns each action's result and, when `screenshot` is set, the screenshot taken after the last action. The actions are the Anthropic computer tool's and OpenAI computer use's, one-to-one. Refused CONTROL_HELD_BY_HUMAN while a human holds control. |
| [`sandboxes.leases.acquire_control`](/docs/api/leases/acquire_control) | `sandboxes:exec` | Takes exclusive input control of a lease's display. A HUMAN acquire preempts an AGENT holder and returns a controller stream; an AGENT acquire is refused CONTROL_HELD_BY_HUMAN while a human holds control. Control lapses at `ttl`, which the platform caps at 30 minutes. |