Get the error codes via OpenSDK_GetLastErrorCode and get the error code information via OpenSDK_GetLastErrorDesc. The API only returns 0 and -1 by default (except some special API). The error code of SDK is listed according to modules. Major and frequently-occurred error codes are shown below.
error code is defined in the header file of OpenNetStreamError.h.
return via information callback function, refer to header file of INS_ErrorCode.h for details.

error code format{xbbbbb}, x represents the module type of error code, bbbbb represent what the error is, the value of x is shown below:

type	definition	remark
0	correct condition	correct
1	network exception	This error is the same with network or configuration information error, so CURL ErrorCode is still available, for example, DNS is not configured.
2	user operation error	User level error code. It is usually caused by improper usage of SDK by the users.
3	platform server error	The error returned by OpenApi. For details, refer to error code of server port
4	system resource exception	Usually caused by inadequate system resource, e.g., inadequate memory.
5	get stream exception	error code of streaming module
6	method not supported	SDK unsupported
7	push error	push relevant error information
9	undefined error	error code without specific definition

The following table shows the definition of the detailed error code value.

Description	Value	Definition	Remark
Network Level
OPEN_SDK_COULDNT_RESOLVE_HOST	100006	unable to resolve to specified remote host	Here it refers that the domain name of the platform fails to be resolved. The reason maybe that the DNS is not configured or the device is disconnected.
OPEN_SDK_COULDNT_CONNECT	100007	the remote host is unavailable	Here it refers to failing to access the platform. It may be caused by incorrect platform address.
OPEN_SDK_OPERATION_TIMEOUT	100028	request timed out	The expiry time is 20s. Request timed out. Check the address configuration of the platform.
User Operation Level
OPEN_SDK_BAD_PARAMS	200001	Invalid incoming parameter of API
OPEN_SDK_SESSION_INVALID	200002	The current session doesn't exist or has been released.	incoming value of SessionId error or the Session has been deleted.
OPEN_SDK_VIDEO_RECORD_NOT_EXIST	200003	No video file exists in the specified period.
OPEN_SDK_VIDEO_RECORD_SEARCHING	200004	Searching video records...
OPEN_SDK_STOP_ALARM_REC_FAILED	200005	Failed to disable alarm.
OPEN_SDK_PERMANENT_KEY_INVALID	200006	Incorrect verificaiton code.
OPEN_SDK_PIC_DECRYPT_FAILED	200007	Failed to decode the picture.
OPEN_SDK_PIC_CONTENT_INVALID	200008	Invalid picture content.
OPEN_SDK_PIC_NO_NEED_DECRYPT	200009	The picture doesn't need to be decoded.
OPEN_SDK_PIC_COULDNT_ALLOC_BUFFERS	200010	Failed to allocate memory of picture resources.	Insufficient memory or the picture size is too large.
EZVIZ API Level
OPEN_SDK_RESPINFO_BAD	300001	The information requested to return. json cannot resolve it.	It may be caused by the configuration problem ofPlatformAddr.
OPEN_SDK_RESPINFO_INVALID	300002	Incorrect return information format of the request.
OPEN_SDK_ACCESSTOKEN_INVALID	310002	accesstoken exception or accesstoken has been expired.
OPEN_SDK_SIGNATURE_ERROR	310008	Incoming parameter error. System displaying signature error.
OPEN_SDK_USERID_PHONE_UNBIND	310014	The third-party userId and phone under APPKEY are unbound.
OPEN_SDK_CHANNEL_NOT_EXIST	320001	The channel doesn't exist.	The channel corresponds with a specific camera.
OPEN_SDK_USER_NOTOWN_DEVICE	320018	The user doesn't have the device.
System Resource Level
OPEN_SDK_COULDNT_CREATE_THREAD	400001	Failed to create a thread.
OPEN_SDK_COULDNT_ALLOC_BUFFERS	400002	Failed to apply memory resources.
Streaming Function Level
OPEN_SDK_NS_OPERATIONCODE_FAILED	500045	Failed to get operation code.	It will report this error if users enabled terminal binding.
OPEN_SDK_NS_STREAM_LIMIT	500410	Limit of streaming channel number	The device connection number reaches upper limit.
OPEN_SDK_NS_DEV_NO_ONLINE	503121	Device offline
OPEN_SDK_NS_PERMANENTKEY_EXCEPTION	502012	Input key again. 1. Clear-text key and MD5 key mismatched.	Verification code error.
OPEN_SDK_NS_VTDU_TIMEOUT	502021	Stream media sending or receiving signal timed out.	Check the device network status. It is usually caused by network problems.
OPEN_SDK_NS_VTDU_CLIENT_TIMEOUT	502025	vtduThe client receiving response timed out.	The camera and DVR/NVR may have connection problems.
Unsupported Level
OPEN_SDK_DEV_NOT_SUPPORT	600001	Only support device of version 1.7.
OPEN_SDK_API_NO_IMPLEMENT	600002	The API is not realized.
Push message level error.
OPEN_SDK_PUSH_PARAM_ERROR	710001	Invalid incoming parameters.
OPEN_SDK_PUSH_DATA_UNINIT_ERROR	710002	The data is uninitialized.	Initialize by calling the API Init first.
OPEN_SDK_PUSH_NO_REGISTER_ERROR	710003	Unregistered on the push system.	Call register API first.
OPEN_SDK_PUSH_NO_MQTT_CREATE_ERROR	710004	Push object hasn't been created.	You haven't call create API.
OPEN_SDK_PUSH_MQTT_DISCONNECTED_ERROR	720003	sdk disconnected with push server.	Network disconnected or unstable network.
OPEN_SDK_PUSH_MQTT_MAX_MESSAGES_ERROR	720004	The number of the received push messages reaches upper limit.
OPEN_SDK_PUSH_MQTT_BAD_UTF8_STRING_ERROR	720005	Invalid UTF-8 string.
OPEN_SDK_PUSH_MQTT_NULL_PARAMETER_ERROR	720006	The incoming parameter is empty pointer.
OPEN_SDK_PUSH_MQTT_VERSION_INVALID_ERROR	730001	Connection fails. Unsupported by the protocol version.
OPEN_SDK_PUSH_MQTT_IDENTIFIER_ERROR	730002	Connection fails, the only ID is incorrect.
OPEN_SDK_PUSH_MQTT_SERVER_UNAVAILABLE_ERROR	730003	Connection fails. The service doesn't exist.
OPEN_SDK_PUSH_MQTT_BAD_USERNAME_PASSWORD_ERROR	730004	Connection fails. Incorrect mqtt username and password.
OPEN_SDK_PUSH_MQTT_NOT_AUTHORIZED_ERROR	730005	Connection fails. Unauthorized.
OPEN_SDK_PUSH_PLATFORM_RESPINFO_BAD	740001	The information returned by the request cannot be resolved normally by json.	It may be caused by invalid configuration of PlatformAddr.
OPEN_SDK_PUSH_PLATFORM_RESPINFO_INVALID	740002	The format of the informaiton returned by the request is incorrect.
OPEN_SDK_PUSH_PLATFORM_SESSION_INVALID_ERROR	740003	Invalid session.	The session might has been released.
OPEN_SDK_PUSH_PLATFORM_UNAUTHORIZED_ERROR	740401	Invalid certificate.	It may be caused by invalid configuration of PlatformAddr.
OPEN_SDK_PUSH_COULDNT_CREATE_THREAD	750001	Failed to create the thread.
OPEN_SDK_PUSH_COULDNT_ALLOC_BUFFERS	750002	Failed to apply memory resources.
OPEN_SDK_PUSH_COULDNT_RESOLVE_HOST	760006	The specified remote host is not been resolved.	Here it refers that the platform domain fails to be resolved normally. It may be caused by unconfigured DNS or disconnected device.
OPEN_SDK_PUSH_COULDNT_CONNECT	760007	The remote host is unavailable	Here it refers that the platform is inaccessible. It may be caused by the configuration error of the platform address.
OPEN_SDK_PUSH_OPERATION_TIMEOUT	760028	Request timed out. The expiry time is 20s.	Sending request to platform timed out. Failed to access the EZVIZ OPEN platform. Check the configured address or the network.
Undefined Level
OPEN_SDK_ALLOCSESSION_FAILED	900001	AllocSession failed.
OPEN_SDK_SEARCH_RECORD_FAILED	900002	Failed to search playback records.
OPEN_SDK_START_ALARM_REC_FAILED	900003	Failed to enable alarm.