Complete Reference Guide.
OPC UA StatusCodes indicate the result of an OPC UA operation or the quality
associated with a value. Defined by IEC 62541, a StatusCode is a 32-bit value
whose severity identifies the result as Good, Uncertain or Bad.
This reference lists the standard OPC UA StatusCodes with their symbolic names,
hexadecimal values and meanings. It can be used to diagnose client/server
communication errors, security and certificate failures, session or subscription
problems, AddressSpace access errors and Historical Access issues.
Understanding OPC UA StatusCodes
An OPC UA StatusCode contains more information than a simple success/error flag.
Its severity distinguishes three main classes:
- Good — the operation completed successfully.
- Uncertain — the result or data quality cannot be considered fully reliable.
- Bad — the operation failed or the associated value is invalid.
For example, BadNodeIdUnknown (0x80340000) indicates that the requested NodeId
does not exist in the server AddressSpace, whileBadCertificateUntrusted (0x801A0000) indicates that the certificate is not
trusted by the receiving application.
The tables below provide a technical reference for the standard OPC UA
StatusCodes.
✅ Status Codes – GOOD
| Niveau | Code symbolique | Code (Hexa)l | Description |
| Good | OpcUa_GoodSubscriptionTransferred | 0x002D0000 | The subscription has been transferred to another session |
| Good | OpcUa_GoodCompletesAsynchronously | 0x002E0000 | The processing will complete asynchronously |
| Good | OpcUa_GoodOverload | 0x002F0000 | Sampling has slowed down due to resource limitations |
| Good | OpcUa_GoodClamped | 0x00300000 | The written value was accepted but clamped |
| Good | OpcUa_GoodResultsMayBeIncomplete | 0x00BA0000 | The results may be incomplete |
| Good | OpcUa_GoodLocalOverride | 0x00960000 | The value has been locally overridden |
| Good | OpcUa_GoodEntryInserted | 0x00A20000 | Historical data was successfully inserted |
| Good | OpcUa_GoodEntryReplaced | 0x00A30000 | Historical data was successfully replaced |
| Good | OpcUa_GoodNoData | 0x00A50000 | No data exists for the requested range |
| Good | OpcUa_GoodMoreData | 0x00A60000 | More data is available |
| Good | OpcUa_GoodCommunicationEvent | 0x00A70000 | A communication event has been raised |
| Good | OpcUa_GoodShutdownEvent | 0x00A80000 | The system is shutting down |
| Good | OpcUa_GoodCallAgain | 0x00A90000 | The operation needs to be called again |
| Good | OpcUa_GoodNonCriticalTimeout | 0x00AA0000 | A non-critical timeout occurred |
| Good | OpcUa_GoodDataIgnored | 0x00D90000 | Data was ignored (invalid or not storable) |
⚠️ Status Codes – UNCERTAIN
| Niveau | Code symbolique | Code (Hexa) | Description |
| Uncertain | OpcUa_UncertainReferenceOutOfServer | 0x406C0000 | A reference in the relative path points to a node in another server |
| Uncertain | OpcUa_UncertainNoCommunicationLastUsableValue | 0x408F0000 | Communication has failed; the last known usable value is provided |
| Uncertain | OpcUa_UncertainLastUsableValue | 0x40900000 | The source is no longer updating the value |
| Uncertain | OpcUa_UncertainSubstituteValue | 0x40910000 | The value has been manually substituted |
| Uncertain | OpcUa_UncertainInitialValue | 0x40920000 | The value is an initial value that has not yet been linked |
| Uncertain | OpcUa_UncertainSensorNotAccurate | 0x40930000 | The value is near the limits of the sensor |
| Uncertain | OpcUa_UncertainEngineeringUnitsExceeded | 0x40940000 | The value is outside the defined engineering unit limits |
| Uncertain | OpcUa_UncertainSubNormal | 0x40950000 | There are not enough Good sources to provide a Good quality |
| Uncertain | OpcUa_UncertainReferenceNotDeleted | 0x40BC0000 | Not all target references could be deleted |
| Uncertain | OpcUa_UncertainNotAllNodesAvailable | 0x40C00000 | Not all nodes are available |
| Uncertain | OpcUa_UncertainDataSubNormal | 0x40A40000 | Composite data has fewer than the required number of Good values |
❌ Status Codes – BAD
| Niveau | Code symbolique | Code (Hexa) | Description |
| Bad | OpcUa_BadUnexpectedError | 0x80010000 | An unexpected error occurred. |
| Bad | OpcUa_BadInternalError | 0x80020000 | An internal error occurred as a result of a programming or configuration error. |
| Bad | OpcUa_BadOutOfMemory | 0x80030000 | Not enough memory to complete the operation. |
| Bad | OpcUa_BadResourceUnavailable | 0x80040000 | An operating system resource is not available. |
| Bad | OpcUa_BadCommunicationError | 0x80050000 | A low level communication error occurred. |
| Bad | OpcUa_BadEncodingError | 0x80060000 | Encoding halted because of invalid data in the objects being serialized. |
| Bad | OpcUa_BadDecodingError | 0x80070000 | Decoding halted because of invalid data in the stream. |
| Bad | OpcUa_BadEncodingLimitsExceeded | 0x80080000 | The message encoding/decoding limits imposed by the stack have been exceeded. |
| Bad | OpcUa_BadRequestTooLarge | 0x80B80000 | The request message size exceeds limits set by the server. |
| Bad | OpcUa_BadResponseTooLarge | 0x80B90000 | The response message size exceeds limits set by the client. |
| Bad | OpcUa_BadUnknownResponse | 0x80090000 | An unrecognized response was received from the server. |
| Bad | OpcUa_BadTimeout | 0x800A0000 | The operation timed out. |
| Bad | OpcUa_BadServiceUnsupported | 0x800B0000 | The server does not support the requested service. |
| Bad | OpcUa_BadShutdown | 0x800C0000 | The operation was cancelled because the application is shutting down. |
| Bad | OpcUa_BadServerNotConnected | 0x800D0000 | The operation could not complete because the client is not connected to the server. |
| Bad | OpcUa_BadServerHalted | 0x800E0000 | The server has stopped and cannot process any requests. |
| Bad | OpcUa_BadNothingToDo | 0x800F0000 | There was nothing to do because the client passed a list of operations with no elements. |
| Bad | OpcUa_BadTooManyOperations | 0x80100000 | The request could not be processed because it specified too many operations. |
| Bad | OpcUa_BadDataTypeIdUnknown | 0x80110000 | The extension object cannot be (de)serialized because the data type id is not recognized. |
| Bad | OpcUa_BadCertificateInvalid | 0x80120000 | The certificate provided as a parameter is not valid. |
| Bad | OpcUa_BadSecurityChecksFailed | 0x80130000 | An error occurred verifying security. |
| Bad | OpcUa_BadCertificateTimeInvalid | 0x80140000 | The Certificate has expired or is not yet valid. |
| Bad | OpcUa_BadCertificateIssuerTimeInvalid | 0x80150000 | An Issuer Certificate has expired or is not yet valid. |
| Bad | OpcUa_BadCertificateHostNameInvalid | 0x80160000 | The HostName used to connect to a Server does not match a HostName in the Certificate. |
| Bad | OpcUa_BadCertificateUriInvalid | 0x80170000 | The URI specified in the ApplicationDescription does not match the URI in the Certificate. |
| Bad | OpcUa_BadCertificateUseNotAllowed | 0x80180000 | The Certificate may not be used for the requested operation. |
| Bad | OpcUa_BadCertificateIssuerUseNotAllowed | 0x80190000 | The Issuer Certificate may not be used for the requested operation. |
| Bad | OpcUa_BadCertificateUntrusted | 0x801A0000 | The Certificate is not trusted. |
| Bad | OpcUa_BadCertificateRevocationUnknown | 0x801B0000 | It was not possible to determine if the Certificate has been revoked. |
| Bad | OpcUa_BadCertificateIssuerRevocationUnknown | 0x801C0000 | It was not possible to determine if the Issuer Certificate has been revoked. |
| Bad | OpcUa_BadCertificateRevoked | 0x801D0000 | The Certificate has been revoked. |
| Bad | OpcUa_BadCertificateIssuerRevoked | 0x801E0000 | The Issuer Certificate has been revoked. |
| Bad | OpcUa_BadUserAccessDenied | 0x801F0000 | User does not have permission to perform the requested operation. |
| Bad | OpcUa_BadIdentityTokenInvalid | 0x80200000 | The user identity token is not valid. |
| Bad | OpcUa_BadIdentityTokenRejected | 0x80210000 | The user identity token is valid but the server has rejected it. |
| Bad | OpcUa_BadSecureChannelIdInvalid | 0x80220000 | The specified secure channel is no longer valid. |
| Bad | OpcUa_BadInvalidTimestamp | 0x80230000 | The timestamp is outside the range allowed by the server. |
| Bad | OpcUa_BadNonceInvalid | 0x80240000 | The nonce does not appear to be random or is not the correct length. |
| Bad | OpcUa_BadSessionIdInvalid | 0x80250000 | The session id is not valid. |
| Bad | OpcUa_BadSessionClosed | 0x80260000 | The session was closed by the client. |
| Bad | OpcUa_BadSessionNotActivated | 0x80270000 | The session cannot be used because ActivateSession has not been called. |
| Bad | OpcUa_BadSubscriptionIdInvalid | 0x80280000 | The subscription id is not valid. |
| Bad | OpcUa_BadRequestHeaderInvalid | 0x802A0000 | The header for the request is missing or invalid. |
| Bad | OpcUa_BadTimestampsToReturnInvalid | 0x802B0000 | The timestamps to return parameter is invalid. |
| Bad | OpcUa_BadRequestCancelledByClient | 0x802C0000 | The request was cancelled by the client. |
| Bad | OpcUa_BadNoCommunication | 0x80310000 | Communication with the data source is defined, but not established, and there is no last known value available. |
| Bad | OpcUa_BadWaitingForInitialData | 0x80320000 | Waiting for the server to obtain values from the underlying data source. |
| Bad | OpcUa_BadNodeIdInvalid | 0x80330000 | The syntax of the node id is not valid. |
| Bad | OpcUa_BadNodeIdUnknown | 0x80340000 | The node id refers to a node that does not exist in the server address space. |
| Bad | OpcUa_BadAttributeIdInvalid | 0x80350000 | The attribute is not supported for the specified Node. |
| Bad | OpcUa_BadIndexRangeInvalid | 0x80360000 | The syntax of the index range parameter is invalid. |
| Bad | OpcUa_BadIndexRangeNoData | 0x80370000 | No data exists within the range of indexes specified. |
| Bad | OpcUa_BadDataEncodingInvalid | 0x80380000 | The data encoding is invalid. |
| Bad | OpcUa_BadDataEncodingUnsupported | 0x80390000 | The server does not support the requested data encoding for the node. |
| Bad | OpcUa_BadNotReadable | 0x803A0000 | The access level does not allow reading or subscribing to the Node. |
| Bad | OpcUa_BadNotWritable | 0x803B0000 | The access level does not allow writing to the Node. |
| Bad | OpcUa_BadOutOfRange | 0x803C0000 | The value was out of range. |
| Bad | OpcUa_BadNotSupported | 0x803D0000 | The requested operation is not supported. |
| Bad | OpcUa_BadNotFound | 0x803E0000 | A requested item was not found or a search operation ended without success. |
| Bad | OpcUa_BadObjectDeleted | 0x803F0000 | The object cannot be used because it has been deleted. |
| Bad | OpcUa_BadNotImplemented | 0x80400000 | Requested operation is not implemented. |
| Bad | OpcUa_BadMonitoringModeInvalid | 0x80410000 | The monitoring mode is invalid. |
| Bad | OpcUa_BadMonitoredItemIdInvalid | 0x80420000 | The monitoring item id does not refer to a valid monitored item. |
| Bad | OpcUa_BadMonitoredItemFilterInvalid | 0x80430000 | The monitored item filter parameter is not valid. |
| Bad | OpcUa_BadMonitoredItemFilterUnsupported | 0x80440000 | The server does not support the requested monitored item filter. |
| Bad | OpcUa_BadFilterNotAllowed | 0x80450000 | A monitoring filter cannot be used in combination with the attribute specified. |
| Bad | OpcUa_BadStructureMissing | 0x80460000 | A mandatory structured parameter was missing or null. |
| Bad | OpcUa_BadEventFilterInvalid | 0x80470000 | The event filter is not valid. |
| Bad | OpcUa_BadContentFilterInvalid | 0x80480000 | The content filter is not valid. |
| Bad | OpcUa_BadFilterOperandInvalid | 0x80490000 | The operand used in a content filter is not valid. |
| Bad | OpcUa_BadContinuationPointInvalid | 0x804A0000 | The continuation point provided is no longer valid. |
| Bad | OpcUa_BadNoContinuationPoints | 0x804B0000 | The operation could not be processed because all continuation points have been allocated. |
| Bad | OpcUa_BadReferenceTypeIdInvalid | 0x804C0000 | The reference type id does not refer to a valid reference type. |
| Bad | OpcUa_BadBrowseDirectionInvalid | 0x804D0000 | The browse direction is not valid. |
| Bad | OpcUa_BadNodeNotInView | 0x804E0000 | The node is not part of the view. |
| Bad | OpcUa_BadServerUriInvalid | 0x804F0000 | The ServerUri is not a valid URI. |
| Bad | OpcUa_BadServerNameMissing | 0x80500000 | No ServerName was specified. |
| Bad | OpcUa_BadDiscoveryUrlMissing | 0x80510000 | No DiscoveryUrl was specified. |
| Bad | OpcUa_BadSempahoreFileMissing | 0x80520000 | The semaphore file specified by the client is not valid. |
| Bad | OpcUa_BadRequestTypeInvalid | 0x80530000 | The security token request type is not valid. |
| Bad | OpcUa_BadSecurityModeRejected | 0x80540000 | The security mode does not meet the requirements set by the Server. |
| Bad | OpcUa_BadSecurityPolicyRejected | 0x80550000 | The security policy does not meet the requirements set by the Server. |
| Bad | OpcUa_BadTooManySessions | 0x80560000 | The server has reached its maximum number of sessions. |
| Bad | OpcUa_BadUserSignatureInvalid | 0x80570000 | The user token signature is missing or invalid. |
| Bad | OpcUa_BadApplicationSignatureInvalid | 0x80580000 | The signature generated with the client certificate is missing or invalid. |
| Bad | OpcUa_BadNoValidCertificates | 0x80590000 | The client did not provide at least one software certificate that is valid and meets the profile requirements for the server. |
| Bad | OpcUa_BadRequestCancelledByRequest | 0x805A0000 | The request was cancelled by the client with the Cancel service. |
| Bad | OpcUa_BadParentNodeIdInvalid | 0x805B0000 | The parent node id does not refer to a valid node. |
| Bad | OpcUa_BadReferenceNotAllowed | 0x805C0000 | The reference could not be created because it violates constraints imposed by the data model. |
| Bad | OpcUa_BadNodeIdRejected | 0x805D0000 | The requested node id was rejected because it was either invalid or not allowed by the server. |
| Bad | OpcUa_BadNodeIdExists | 0x805E0000 | The requested node id is already used by another node. |
| Bad | OpcUa_BadNodeClassInvalid | 0x805F0000 | The node class is not valid. |
| Bad | OpcUa_BadBrowseNameInvalid | 0x80600000 | The browse name is invalid. |
| Bad | OpcUa_BadBrowseNameDuplicated | 0x80610000 | The browse name is not unique among nodes that share the same relationship with the parent. |
| Bad | OpcUa_BadNodeAttributesInvalid | 0x80620000 | The node attributes are not valid for the node class. |
| Bad | OpcUa_BadTypeDefinitionInvalid | 0x80630000 | The type definition node id does not reference an appropriate type node. |
| Bad | OpcUa_BadSourceNodeIdInvalid | 0x80640000 | The source node id does not reference a valid node. |
| Bad | OpcUa_BadTargetNodeIdInvalid | 0x80650000 | The target node id does not reference a valid node. |
| Bad | OpcUa_BadDuplicateReferenceNotAllowed | 0x80660000 | The reference type between the nodes is already defined. |
| Bad | OpcUa_BadInvalidSelfReference | 0x80670000 | The server does not allow this type of self reference on this node. |
| Bad | OpcUa_BadReferenceLocalOnly | 0x80680000 | The reference type is not valid for a reference to a remote server. |
| Bad | OpcUa_BadNoDeleteRights | 0x80690000 | The server will not allow the node to be deleted. |
| Bad | OpcUa_BadServerIndexInvalid | 0x806A0000 | The server index is not valid. |
| Bad | OpcUa_BadViewIdUnknown | 0x806B0000 | The view id does not refer to a valid view node. |
| Bad | OpcUa_BadMaxAgeInvalid | 0x80700000 | The max age parameter is invalid. |
| Bad | OpcUa_BadHistoryOperationInvalid | 0x80710000 | The history details parameter is not valid. |
| Bad | OpcUa_BadHistoryOperationUnsupported | 0x80720000 | The server does not support the requested operation. |
| Bad | OpcUa_BadWriteNotSupported | 0x80730000 | The server does not support writing the combination of value, status and timestamps provided. |
| Bad | OpcUa_BadTypeMismatch | 0x80740000 | The value supplied for the attribute is not of the same type as the attribute’s value. |
| Bad | OpcUa_BadMethodInvalid | 0x80750000 | The method id does not refer to a method for the specified object. |
| Bad | OpcUa_BadArgumentsMissing | 0x80760000 | The client did not specify all of the input arguments for the method. |
| Bad | OpcUa_BadTooManySubscriptions | 0x80770000 | The server has reached its maximum number of subscriptions. |
| Bad | OpcUa_BadTooManyPublishRequests | 0x80780000 | The server has reached the maximum number of queued publish requests. |
| Bad | OpcUa_BadNoSubscription | 0x80790000 | There is no subscription available for this session. |
| Bad | OpcUa_BadSequenceNumberUnknown | 0x807A0000 | The sequence number is unknown to the server. |
| Bad | OpcUa_BadMessageNotAvailable | 0x807B0000 | The requested notification message is no longer available. |
| Bad | OpcUa_BadInsufficientClientProfile | 0x807C0000 | The Client of the current Session does not support one or more Profiles that are necessary for the Subscription. |
| Bad | OpcUa_BadTcpServerTooBusy | 0x807D0000 | The server cannot process the request because it is too busy. |
| Bad | OpcUa_BadTcpMessageTypeInvalid | 0x807E0000 | The type of the message specified in the header invalid. |
| Bad | OpcUa_BadTcpSecureChannelUnknown | 0x807F0000 | The SecureChannelId and/or TokenId are not currently in use. |
| Bad | OpcUa_BadTcpMessageTooLarge | 0x80800000 | The size of the message specified in the header is too large. |
| Bad | OpcUa_BadTcpNotEnoughResources | 0x80810000 | There are not enough resources to process the request. |
| Bad | OpcUa_BadTcpInternalError | 0x80820000 | An internal error occurred. |
| Bad | OpcUa_BadTcpEndpointUrlInvalid | 0x80830000 | The Server does not recognize the QueryString specified. |
| Bad | OpcUa_BadRequestInterrupted | 0x80840000 | The request could not be sent because of a network interruption. |
| Bad | OpcUa_BadRequestTimeout | 0x80850000 | Timeout occurred while processing the request. |
| Bad | OpcUa_BadSecureChannelClosed | 0x80860000 | The secure channel has been closed. |
| Bad | OpcUa_BadSecureChannelTokenUnknown | 0x80870000 | The token has expired or is not recognized. |
| Bad | OpcUa_BadSequenceNumberInvalid | 0x80880000 | The sequence number is not valid. |
| Bad | OpcUa_BadProtocolVersionUnsupported | 0x80BE0000 | The applications do not have compatible protocol versions. |
| Bad | OpcUa_BadConfigurationError | 0x80890000 | There is a problem with the configuration that affects the usefulness of the value. |
| Bad | OpcUa_BadNotConnected | 0x808A0000 | The variable should receive its value from another variable, but has never been configured to do so. |
| Bad | OpcUa_BadDeviceFailure | 0x808B0000 | There has been a failure in the device/data source that generates the value that has affected the value. |
| Bad | OpcUa_BadSensorFailure | 0x808C0000 | There has been a failure in the sensor from which the value is derived by the device/data source. |
| Bad | OpcUa_BadOutOfService | 0x808D0000 | The source of the data is not operational. |
| Bad | OpcUa_BadDeadbandFilterInvalid | 0x808E0000 | The deadband filter is not valid. |
| Bad | OpcUa_BadRefreshInProgress | 0x80970000 | This Condition refresh failed, a Condition refresh operation is already in progress. |
| Bad | OpcUa_BadConditionAlreadyDisabled | 0x80980000 | This condition has already been disabled. |
| Bad | OpcUa_BadConditionDisabled | 0x80990000 | Property not available, this condition is disabled. |
| Bad | OpcUa_BadEventIdUnknown | 0x809A0000 | The specified event id is not recognized. |
| Bad | OpcUa_BadNoData | 0x809B0000 | No data exists for the requested time range or event filter. |
| Bad | OpcUa_BadDataLost | 0x809D0000 | Data is missing due to collection started/stopped/lost. |
| Bad | OpcUa_BadDataUnavailable | 0x809E0000 | Expected data is unavailable for the requested time range due to temporary unavailability. |
| Bad | OpcUa_BadEntryExists | 0x809F0000 | The data or event was not successfully inserted because a matching entry exists. |
| Bad | OpcUa_BadNoEntryExists | 0x80A00000 | The data or event was not successfully updated because no matching entry exists. |
| Bad | OpcUa_BadTimestampNotSupported | 0x80A10000 | Client requested history using an unsupported timestamp format. |
| Bad | OpcUa_BadInvalidArgument | 0x80AB0000 | One or more arguments are invalid. |
| Bad | OpcUa_BadConnectionRejected | 0x80AC0000 | Could not establish a network connection to remote server. |
| Bad | OpcUa_BadDisconnect | 0x80AD0000 | The server has disconnected from the client. |
| Bad | OpcUa_BadConnectionClosed | 0x80AE0000 | The network connection has been closed. |
| Bad | OpcUa_BadInvalidState | 0x80AF0000 | The object is closed, uninitialized or in an invalid state. |
| Bad | OpcUa_BadEndOfStream | 0x80B00000 | Cannot move beyond end of the stream. |
| Bad | OpcUa_BadNoDataAvailable | 0x80B10000 | No data is currently available for reading from a non-blocking stream. |
| Bad | OpcUa_BadWaitingForResponse | 0x80B20000 | The asynchronous operation is waiting for a response. |
| Bad | OpcUa_BadOperationAbandoned | 0x80B30000 | The asynchronous operation was abandoned by the caller. |
| Bad | OpcUa_BadExpectedStreamToBlock | 0x80B40000 | The stream did not return all data requested. |
| Bad | OpcUa_BadWouldBlock | 0x80B50000 | Non blocking behaviour is required and the operation would block. |
| Bad | OpcUa_BadSyntaxError | 0x80B60000 | A value had an invalid syntax. |
| Bad | OpcUa_BadMaxConnectionsReached | 0x80B70000 | All available connections are in use. |
| Bad | OpcUa_BadEventNotAcknowledgeable | 0x80BB0000 | The event cannot be acknowledged. |
| Bad | OpcUa_BadStateNotActive | 0x80BF0000 | The sub-state machine is not currently active. |
| Bad | OpcUa_BadFilterOperatorInvalid | 0x80C10000 | An unrecognized operator was provided in a filter. |
| Bad | OpcUa_BadFilterOperatorUnsupported | 0x80C20000 | A valid operator was provided, but the server does not provide support for this filter operator. |
| Bad | OpcUa_BadFilterOperandCountMismatch | 0x80C30000 | The number of operands provided for the filter operator was less than expected. |
| Bad | OpcUa_BadFilterElementInvalid | 0x80C40000 | The referenced element is not a valid element in the content filter. |
| Bad | OpcUa_BadFilterLiteralInvalid | 0x80C50000 | The referenced literal is not a valid value. |
| Bad | OpcUa_BadIdentityChangeNotSupported | 0x80C60000 | The Server does not support changing the user identity assigned to the session. |
| Bad | OpcUa_BadViewTimestampInvalid | 0x80C90000 | The view timestamp is not available or not supported. |
| Bad | OpcUa_BadViewParameterMismatch | 0x80CA0000 | The view parameters are not consistent with each other. |
| Bad | OpcUa_BadViewVersionInvalid | 0x80CB0000 | The view version is not available or not supported. |
| Bad | OpcUa_BadConditionAlreadyEnabled | 0x80CC0000 | This condition has already been enabled. |
| Bad | OpcUa_BadDialogNotActive | 0x80CD0000 | The dialog condition is not active. |
| Bad | OpcUa_BadDialogResponseInvalid | 0x80CE0000 | The response is not valid for the dialog. |
| Bad | OpcUa_BadConditionBranchAlreadyAcked | 0x80CF0000 | The condition branch has already been acknowledged. |
| Bad | OpcUa_BadConditionBranchAlreadyConfirmed | 0x80D00000 | The condition branch has already been confirmed. |
| Bad | OpcUa_BadConditionAlreadyShelved | 0x80D10000 | The condition has already been shelved. |
| Bad | OpcUa_BadConditionNotShelved | 0x80D20000 | The condition is not currently shelved. |
| Bad | OpcUa_BadShelvingTimeOutOfRange | 0x80D30000 | The shelving time not within an acceptable range. |
| Bad | OpcUa_BadAggregateListMismatch | 0x80D40000 | The requested number of Aggregates does not match the requested number of NodeIds. |
| Bad | OpcUa_BadAggregateNotSupported | 0x80D50000 | The requested Aggregate is not support by the server. |
| Bad | OpcUa_BadAggregateInvalidInputs | 0x80D60000 | The aggregate value could not be derived due to invalid data inputs. |
| Bad | OpcUa_BadBoundNotFound | 0x80D70000 | No data found to provide upper or lower bound value. |
| Bad | OpcUa_BadBoundNotSupported | 0x80D80000 | The server cannot retrieve a bound for the variable. |
| Bad | OpcUa_BadAggregateConfigurationRejected | 0x80DA0000 | The aggregate configuration is not valid for specified node. |
| Bad | OpcUa_BadCertificateChainIncomplete | 0x810D0000 | The certificate chain is incomplete. |
| Bad | OpcUa_BadCertificatePolicyCheckFailed | 0x81140000 | The certificate does not meet the requirements of the security policy. |
| Bad | OpcUa_BadAlreadyExists | 0x81150000 | An equivalent rule or node already exists. |