# Error Codes ## Synchronous Errors All ThingSpace Diagnostics Services API resources use this set of status codes in responses. | HTTP Status | Error Code | Message | Explanation and Suggested Action | | ----------- | ----------------------- | -------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------- | | 500 | INTERNAL_SYSTEM_ERROR | The system encountered an internal error | Please try again later | | 400 | DEVICE_NOT_FOUND | The device was not found. | - | | 500 | DEVICE_UNREGISTERED | The device is unregistered. | Please check the device id to ensure it is correct, and if it is, please register the device. | | 400 | DEVICE_NOT_ELIGIBLE | The device is not eligible for service. | - | | 403 | ACCOUNT_USAGE_EXCEEDED | The account usage has been exceeded. | - | | 500 | UNREGISTERED_ACCOUNT | The account has been unregistered, and usage is no longer permitted. | - | | 500 | INACTIVE_ACCOUNT | The account is inactive. | - | | 400 | INVALID_PARAMETER | The request parameter is invalid. | - | | 500 | NOT_FOUND | The database query could not be found. | - | | 403 | CALLBACK_NOT_REGISTERED | Callback is not registered for this account. | Register the callback URL so that the Diagnostics service callback notifications are sent to the registered URL endpoint. | | 401 | INVALID_ACCOUNT | An error was encountered when trying to verify the UWS account. | - | | 400 | INVALID_PARAMETER | Transaction ID is already canceled. | The observe associated with the transaction ID has ended. | | 400 | INVALID_PARAMETER | Observe has failed for this transaction ID. | Check the transaction ID to ensure it is correct. | ## Asynchronous Errors All ThingSpace Diagnostics Services API resources use this set of status codes in responses. | HTTP Status | Error Code | Message | Resolution | | ----------------------------- | ------------------------------- | ------------------------------------------------------------------------- | ----------------------------------------------------------------------------- | | INTERNAL_SYSTEM_ERROR | Internal system error | The system encountered an internal error. | - | | DEVICE_UNREACHABLE | Device not reachable | The device is not reachable. |  The request will be sent to the device once it becomes available.  | | DEVICE_UNREGISTERED | Device not eligible for service | The device is not registered. | - | | DEVICE_NOT_NOTIFY_DATA | Device error | Notify response data is not present. | - | | NO_DEVICE_NOTIFY_DATA_PRESENT | Device error | Observe request is active, but notify response has not yet been received. | - | | DEVICE_NOT_SUPPORT_FEATURE | Device not eligible for service | The device is not eligible for service as the node could not be found. | - | | OBSERVE_ALREADY_IN_PROGRESS | Observe already in progress | An observe process is already in progress. | Please cancel the current observe process and initiate a new observe process. | | NO_ACTIVE_OBSERVE_IN_PROGRESS | No active observe in progress | There is no active observe in progress. | - | | DEVICE_ERROR | Device error | The device encountered an error. | - | | QUEUED_TIMEOUT | Request queued timeout | Pending queue time out error. | - | | UNKNOWN_ERROR | Unknown error occurred. | An unknown error occurred. | - |