Network Streams Library Error Codes
The Network Streams Library functions return negative values when they detect errors. The following table lists the error codes, defined constants, and error messages associated with functions in the the LabWindows/CVI Network Streams Library.
Use the CNSGetErrorDescription function to convert the error code, returned in the error parameter of Network Streams Library functions, into meaningful error messages.
Error codes are defined in the cvi\include\cvinetstreams.h file.
| Value | Defined Constant | Error Message |
| -6999 | CNSErrStreamManagerNotExists | The Network Streams Engine does not exist. |
| -6998 | CNSErrStreamManagerAlreadyInited | The Network Streams Engine was already initialized. |
| -6997 | CNSErrStreamManagerNotInited | The Network Streams Engine is not initialized. |
| -6996 | CNSErrStreamManagerInitFailed | The Network Streams Engine initialization failed. |
| -6995 | CNSErrStreamManagerUninitFailed | The Network Streams Engine uninitialization failed. |
| -6994 | CNSErrStreamNotExists | The specified endpoint does not exist. |
| -6993 | CNSErrStreamAlreadyExists | An endpoint with the same name already exists. |
| -6992 | CNSErrStreamInvalidSize | The buffer size of the endpoint must be greater than zero. |
| -6991 | CNSErrStreamInvalidName | You did not specify a valid endpoint name. |
| -6990 | CNSErrStreamReadOnly | You cannot write to a reader endpoint. |
| -6989 | CNSErrStreamWriteOnly | You cannot read from a writer endpoint. |
| -6988 | CNSErrStreamNotLinked | The local endpoint is not connected to a remote endpoint. |
| -6887 | CNSErrStreamAlreadyLinked | The local endpoint is already connected to another endpoint. Each endpoint can connect to only one other endpoint at a time. |
| -6886 | CNSErrStreamAlreadyExistsAsAncestor | The name of one endpoint cannot be the partial name of another endpoint within the same application. Change the name of this endpoint so that it does not overlap with an existing name, or destroy the other endpoint before creating this endpoint. |
| -6985 | CNSErrStreamAlreadyExistsAsDescendant | The name of one endpoint cannot be the partial name of another endpoint within the same application. Change the name of this endpoint so that it does not overlap with an existing name, or destroy the other endpoint before creating this endpoint. |
| -6984 | CNSErrStreamCanNotSync | The local endpoint lost connection and reconnected with the remote endpoint, but some data was lost. |
| -6983 | CNSErrStreamCanNotFlush | You cannot flush a network stream from the reader endpoint. |
| -6982 | CNSErrStreamMultiReadWriteOverflow | You cannot read or write a number of elements that is larger than the size of the endpoint buffer. |
| -6981 | CNSErrStreamIsOrphan | The remote endpoint has been destroyed. |
| -6980 | CNSErrStreamIncompatibleFormat | Incompatible format. |
| -6979 | CNSErrStreamCouldNotAllocateMemory | The Network Streams Library could not create the local endpoint because the computer that hosts the endpoint ran out of memory. |
| -6978 | CNSErrStreamRestarted | The remote endpoint was restarted because the computer that hosts the endpoint crashed, was rebooted, or experienced a hang. |
| -6977 | CNSErrStreamOutOfSync | The stream detected an unrecoverable loss of data. Contact National Instruments for support. |
| -6976 | CNSErrStreamIncompatibleDataType | The data type of the remote endpoint does not match the data type of the local endpoint. The data types of the endpoints must match. |
| -6975 | CNSErrStreamIncompatibleAccess | The remote and local endpoints are either both reader endpoints or both writer endpoints. You can prompt a connection between a reader and writer endpoint. |
| -6974 | CNSErrMSGStreamAlreadyLinked | The remote endpoint is already connected to another endpoint. Each endpoint can connect to only one other endpoint at a time. |
| -6973 | CNSErrMSGStreamIsOrphan | The remote endpoint has been destroyed. |
| -6972 | CNSErrMSGStreamCouldNotAllocateMemory | The Network Streams Library could not create the remote endpoint because the computer that hosts the endpoint ran out of memory. |
| -6971 | CNSErrMSGStreamRestarted | The local endpoint was restarted because the computer that hosts the remote endpoint crashed, was rebooted, or experienced a hang. |
| -6970 | CNSErrMSGStreamLinkingToDifferentEndpoint | The local endpoint found the remote endpoint at the URL you specified, but the remote endpoint was trying to connect to a third endpoint. Ensure that corresponding endpoints each specify the URL of the other endpoint, or specify a URL with only one of the endpoints so the other endpoint accepts a connection from the first endpoint that connects to it. |
| -6969 | CNSErrIncompatibleProtocol | The protocol version of the writer endpoint is not compatible with the protocol version of the reader endpoint. To transfer data between these endpoints, you must upgrade the version of LabVIEW or LabWindows/CVI that the older endpoint uses. |
| -6968 | CNSErrLogosXTDuplicateService | Another application is already streaming data to an endpoint in the context you specified. If you specified a context name in the reader name or writer name terminal of the endpoint, you must specify an unused context name. If you did not specify a context name, you must specify an unused context name by entering an endpoint URL in the reader name or writer name terminal. |
| -6967 | CNSErrNullPointerPassed | A NULL pointer was passed to the Network Streams Library. |
| -6966 | CNSErrNotEnoughMemory | Not enough memory. |
| -6965 | CNSErrUnexpectedError | Unexpected error. Please contact National Instruments for support. |
| -6964 | CNSErrUnexpectedException | Unexpected exception. Please contact National Instruments for support. |
| -6963 | CNSErrNWStreamDLLNotFound | ni_nwstreams_local.dll could not be loaded. |
| -6962 | CNSErrCNStreamDLLNotFound | cnetstreams.dll could not be loaded. |
| -6961 | CNSErrWrongDLLVersion | cnetstreams.dll version does not match ni_nwstreams_local.dll. |
| -6960 | CNSErrCouldNotFindFunction | Function not found in cnetstreams.dll. You may have installed an older version of the Network Streams Library. Please install the correct version. |
| -6959 | CNSErrCouldNotCreateMutex | Unable to create mutex for loading cnetstreams.dll. |
| -6958 | CNSErrOperationTimedOut | Operation has timed out. |
| -6957 | CNSErrDataTypeNotScalar | The network stream data does not contain a scalar. |
| -6956 | CNSErrDataTypeNotArray | The network stream data does not contain an array. |
| -6955 | CNSErrDataTypeNotStruct | The network stream data does not contain a structure. |
| -6954 | CNSErrEndpointNotArray | The data type of this endpoint is not an array. |
| -6953 | CNSErrInvalidArray | The array does not contain the specified number of elements. |
| -6952 | CNSErrInvalidArraySize | The array size cannot be 0 or exceed INT_MAX. For multidimensional arrays the number of dimensions cannot be 0 or exceed USHRT_MAX. |
| -6951 | CNSErrInvalidDataType | This function does not support the given data type. |
| -6950 | CNSErrInvalidDataHandle | The network stream data handle is invalid. |
| -6949 | CNSErrInvalidArgument | One of the function arguments has an invalid value. |
| -6948 | CNSErrIncompatibleFunction | This function cannot be called for this endpoint. Please check the data type. |
| -6947 | CNSErrNrElementsNotMatch | The number of elements in the network stream data does not match the specified size. |
| -6946 | CNSErrWriterOnlyAttribute | This attribute is only valid for a writer endpoint. |
| -6945 | CNSErrReaderOnlyAttribute | This attribute is only valid for a reader endpoint. |
| -6944 | CNSErrBadAttribute | Invalid attribute. |
| -6943 | CNSErrURLGeneralSyntax | Invalid URL. The URL cannot contain # or ? characters. |
| -6942 | CNSErrURLUnsupportedPathSegment | The URL contains one or more unsupported path segments. Path segments of the form '/./', '/../', and empty path segments '//' are not supported. |
| -6941 | CNSErrURLRemoteHostNotSupported | The endpointUrl specifies a host name that does not correspond to the local host. |
| -6940 | CNSErrURLEmptyString | The endpointUrl cannot be empty or NULL. |
| -6939 | CNSErrURLRemoteHostRelativePath | You cannot specify a relative URL for the otherEndpointUrl parameter. You must use an absolute URL. |
| -6938 | CNSErrURLUnsupportedScheme | The scheme specified in the URL is not supported. |
| -6937 | CNSErrOpenConnections | Some connections are still open. Please discard all endpoints before uninitializing the Network Streams Library. |
| -6936 | CNSErrArrayUnsupported | CNSReadMultipleData and CNSWriteMultipleData do not support network stream data containing scalar arrays. |