An unexpected error occurred.

An internal error occurred as a result of a programming or configuration error.

Not enough memory to complete this operation.

A resource of the operating system is not available.

A low level communication error occurred.

Encoding halted because of invalid data in the objects being serialized.

Decoding halted because of invalid data in the stream.

The limits of encoding or decoding messages imposed by the stack were exceeded.

Size of request message exceeds the limits imposed by the server.

Size of response message exceeds the limits imposed by the client.

An unrecognized response was received from the server.

Operation timed out.

Server does not support the requested service.

Operation cancelled because application is shutting down.

Operation could not complete because client is not connected to server.

Server stopped and cannot process any requests.

Nothing to do because client passed a list of operations without elements.

Request could not be processed because it specifies too many operations.

Extension object cannot be serialized or deserialized because data type ID is not recognized.

Provided certificate as a parameter is not valid.

An error occurred while verifying security.

Certificate expired or it is not yet valid.

Certificate Issuer expired or it is not yet valid.

Hostname used to connect to server does not match Hostname in the certificate.

Specified URI in ApplicationDescription does not match URI in the certificate.

Certificate cannot be used for the requested operation.

Certificate Issuer cannot be used for the requested operation.

Certificate is not trusted.

Cannot determine whether the certificate was revoked or not.

Cannot determine whether Certificate Issuer was revoked or not.

Certificate was revoked.

Certificate Issuer was revoked.

User does not have permission to perform the requested operation.

User's identity token is not valid.

User's identity token is valid but the server rejected it.

Specified secure channel is no longer valid.

Timestamp outside server's allowed range.

Nonce does not appear to be a random value or does not have the correct length.

Session ID is not valid.

Session was closed by the client.

Session cannot be used because ActivateSession was not called.

Subscription ID is not valid.

Request header is missing or invalid.

Timestamps to return are invalid.

Request cancelled by the client.

Subscription was transferred to another session.

Processing will be completed asynchronously.

Sampling slowed down due to resource limitations.

Written value was accepted but clamped.

Communication with data source is defined but not established, and there is no last known value available.

Waiting for the server to obtain values from the underlying data source.

Syntax of node ID is not valid.

Node ID refers to a node that does not exist in the server's address space.

Attribute is not supported for the specified node.

Syntax of index range parameter is invalid.

There is no data in the specified range of indexes.

Data encoding is invalid.

Server does not support the requested data encoding for the node.

Access level does not allow reading or subscribing to the node.

Access level does not allow writing to the node.

Value is out of range.

Requested operation is not supported.

Requested item not found or a search operation ended without success.

Object cannot be used because it was deleted.

Requested operation is not implemented.

Invalid monitoring mode.

Monitored item ID does not refer to a valid monitored item.

Monitored item filter is not valid.

Server does not support the requested monitored item filter.

Monitored filter cannot be used together with the specified attribute.

Mandatory structure is missing or null.

Invalid event filter.

Invalid content filter.

Unrecognized operator provided in a filter.

Valid operator provided, but the server does not support that filter operator.

Number of operands provided for filter operator is less than expected for that operand.

Operand used in a content filter is not valid.

Referenced element is not valid in the content filter.

Referenced literal is an invalid value.

Provided continuation point is invalid.

Operation could not be processed because all continuation points were allocated.

Operation could not be processed because all continuation points were allocated.

Invalid browse direction.

Node is not part of view.

ServerUri is not a valid URI.

Servername was not specified.

DiscoveryUrl was not specified.

Semaphore file specified by the client is invalid.

Security token's request type is invalid.

Security mode does not match server requirements.

Security policy does not match server requirements.

Server reached its maximum number of sessions.

User's token signature is missing or invalid.

Signature generated with client's certificate is missing or invalid.

Client did not provide at least one valid software certificate that matches the server's profile requirements.

Server does not support changing user's identity assigned to session.

Request cancelled by the client using the cancel service.

Parent node ID does not refer to a valid node.

Reference could not be created because it violates constraints imposed by data model.

Requested node ID rejected because it was either invalid or the server does not allow client-specified node IDs.

Requested node ID already in use by another node.

Invalid node class.

Invalid browse name.

Browse name is not unique among nodes that share the same relationship with parent.

Invalid node attributes for the node class.

Node ID's type definition does not reference an appropriate node type.

Source node ID does not reference a valid node.

Target node ID does not reference a valid node.

Reference type between nodes already defined.

Server does not allow this type of self-reference on this node.

Invalid reference type for a reference to a remote server.

Server does not allow deleting this node.

Server could not delete all target references.

Invalid server index.

View ID does not refer to a valid view node.

View's timestamp is not available or not supported.

View parameters are not consistent with each other.

View version is not available or not supported.

List of references may not be complete because the underlying system is not available.

Server should have followed a reference to a node in a remote server but it did not. Result set may be incomplete.

Provided Nodeid is not a type definition nodeid.

One of the references to follow in the relative path references a node in the address space in another server.

Requested operation contains too many matches to return.

Requested operation requires too many server resources.

Requested operation contains no matches to return.

Invalid maximum age.

Invalid history details.

Server does not support requested operation.

Invalid timestamp.

Server does not support writing the provided combination of value, status, and timestamp.

Supplied value for the attribute does not have the same type of attribute's value.

Method ID does not refer to a method for the specified object.

Client did not specify all input arguments of the method.

Server reached its maximum number of subscriptions.

Server reached its maximum number of queued-publish requests.

No subscription available for this session.

Sequence number is unknown to the server.

Requested notification message is no longer available.

Client of the current session does not support one or more profiles necessary for subscription.

Sub-state machine not currently active.

Server cannot process request becaus it is too busy.

Invalid type specified in message's header.

SecureChannelId or TokenId are not currently in use.

Size specified in message's header is too large.

Not enough resources to process request.

Internal error occurred.

Server does not recognize the specified query string.

Request could not be set due to a network interruption.

Time-out occurred while processing request.

Secure channel was closed.

Expired token or it is not recognized.

Invalid sequence number.

Application does not have compatible protocol versions.

Problem with configuration affecting value's usefulness.

Variable must receive its value from another variable, but it was never configured to do so.

A failure happened on the device or data source that generates the value and it affected that value.

A failure happened in the sensor from which the value derives by the device or data source.

Data source is not operational.

Invalid dead band filter.

Communication with data source failed. Value of the variable is the last value with a good quality.

Whatever updating this value stopped doing so.

Value is an operational value manually overwritten.

Value is an initial value for a variable that normally receives its value from another variable.

Value is at one of sensor limits.

Value is outside the range of values defined for this parameter.

Value is derived from multiple sources and contains less than the required number of good sources.

Value was overridden

Failed refreshing condition because a refresh operation is already in progress.

This condition was already disabled.

This condition was already enabled.

Property not available, this condition is disabled.

Specified event ID is not recognized.

Event cannot be acknowledged.

Dialog condition is not active.

Response is not valid for the dialog.

Condition branch was already acknowledged.

Condition branch was already confirmed.

Condition was already shelved.

Condition is not currently shelved.

Shelving time is not within an acceptable range.

There is no data for the requested time range or event filter.

There is no data to provide upper or lower bound value.

Data is missing due to collection started, stopped, or lost.

Expected data is unavailable for the requested time range due to an unmounted volume, an off-line archive or tape, or a similar reason for temporary unavailability.

Data or event was not successfully inserted because a matching entry already exists.

Data or event was not successfully updated because no matching entry exists.

Client requested history using a timestamp format not supported by the server, that is, the requested ServerTimestamp only supports SourceTimestamp.

Data or event was successfully inserted in the historical database.

Data or event field was successfully replaced in the historical database.

Value is derived from multiple values and contains less than the required number of good values.

There is no data for the requested time range or event filter.

Data or event field was successfully replaced in the historical database.

Communication layer raised an event.

System is shutting down.

Operation is not finished and must be called again.

A non-critical time-out occurred.

One or more arguments are invalid.

Could not establish a network connection to a remote server.

Server disconnected from client.

Network connection was closed.

Operation cannot be completed because the object is closed, uninitialized, or in some other invalid state.

Cannot move beyond the end of the stream.

No data is currently available for reading from a non-blocking stream.

Asynchronous operation is waiting for a response.

Asynchronous operation abandoned by the caller.

Stream did not return all requested data, possibly because it is a non-blocking stream.

Non-blocking behaviour required, therefore the operation will be blocked.

Invalid value syntax.

Operation could not be finished because all available connections are in use.

Operation completed successfully.

Operation completed, but its outputs may not be usable.

Operation failed.