# 31481: Call/Transaction Does Not Exist

Log Level: ERROR

## Description

31481 means the call or transaction you are referencing no longer exists. For outgoing calls, Twilio does not assign a `CallSID` until the `accept` event fires, and a `Call` can move to `closed` after the remote end cancels it.

### Possible causes

* You tried to read or use an outgoing call's `CallSID` before the `accept` event fired. For outgoing calls, the call may not have a `CallSID` until then.
* The call was canceled by the remote end, which transitions the `Call` to `closed`.
* In a Voice SDK app, the `CallInvite` object was released before the underlying signaling connection finished processing the invite lifecycle.

### Possible solutions

* Wait for the outgoing call's `accept` event before you read or rely on `CallSID`.
* Treat `cancel` as terminal in your call flow and stop any follow-up actions once the call has been canceled or disconnected.
* Keep the `CallInvite` object alive until the invite is accepted, rejected, or canceled.

#### Additional resources

* [Error and Warning Dictionary](/docs/api/errors)
* [Voice JavaScript SDK: Twilio.Call](/docs/voice/sdks/javascript/twiliocall)
* [Voice Android SDK Changelog](/docs/voice/sdks/android/3x-changelog)