All Programmable Voice Error Codes are five-digit integers. Below is the list of errors Programmable Voice is currently using. Note that we are still working on finalizing the list and it may change while in Beta.
| Code | Description | Explanation |
|---|---|---|
| 31000 | Generic error. | A call error occurred that is not covered by a more specific error code. No further information available. Check the debugger for more info. |
| 31003 | Connection timeout. | The server could not produce a response within a suitable amount of time. |
| 31004 | Initialization error in iOS SDK. | The iOS SDK couldn't initialize user agent due to an internal error. |
| 31005 | Connection error. | A connection error occurred during the call. |
| 31006 | Audio device error. | Unable to start the audio device. |
| Code | Description | Explanation |
|---|---|---|
| 21218 | TwiML application not found. | The server was not able to find the TwiML application associated with the App SID. |
| 31100 | Malformed request. | The request could not be understood due to malformed syntax. |
| 31106 | Invalid data. | The provided data to handleMessage(...)/handleNotification(...) API was not valid. |
| 31107 | No CallInvite with this CallSid. | A cancel notification was received for a non existing CallInvite. |
| Code | Description | Explanation |
|---|---|---|
| 20101 | Invalid access token. | The Access Token provided to the SDK is invalid. This may happen when the Access Token is structurally incorrect. |
| 20102 | Invalid Access Token header. | The header of the Access Token provided to the SDK is invalid. |
| 20103 | Invalid Access Token issuer/subject. | The issuer or subject of the Access Token provided is invalid. |
| 20104 | Access Token expired or expiration date invalid. | The Access Token provided to the SDK has expired, the expiration time specified in the token was invalid, or the expiration time specified was too far in the future. |
| 20105 | Access Token not yet valid. | The Access Token provided to the SDK is not yet valid. |
| 20106 | Invalid Access Token grants. | The Access Token does not include voice grants. |
| 20107 | Invalid Access Token signature. | The signature for the Access Token provided was invalid. Ensure the secret included in the Access Token is valid. |
| 20151 | The authorization with Token failed. | The system could not perform the authorization for the given request. |
| 20157 | Expiration Time Exceeds Maximum Time Allowed. | The expiration time provided in the Access Token exceeds the maximum duration allowed. |
| 20403 | 403 Forbidden. | The expiration time provided in the Access Token exceeds the maximum duration allowed. |
| 31201 | Authorization error. | The server understood the request, but is refusing to fulfill it. This happens when a CallInvite is generated from invalid data. |
| Code | Description | Explanation |
|---|---|---|
| 31301 | Registration or Unregistration failed. | The registration request to Twilio failed with an exception. This can be caused by an http related error or by an invalid push credential. |
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