Release Notes for Prosys Sentrol 7.3.0

This version improves support for usage of the OPC UA client component in C++ Builder in a few ways.

There is also a new tutorial project,
LessonUa1_UaClient, which helps to get into the basics in both Delphi and C++ Builder. The Client Tutorial is updated to refer to the new Tutorial project (LessonUa1) that is included in the installation.

The release also fixes several memory leaks and decoding of a few data types in the SDK and stack. Therefore we recommend all customers to update to this version.

Changes to common functionality

• Improved: TPsSaxParser with better messages for XML parsing errors (used by TUaServer for loading nodeset files)

Changes to OPC Classic functionality

• New: TPsOPCConnector.InactivateItemsOnError & TPsOPCGroup.InactivateItemsOnError

Changes to common OPC UA functionality

• Changed: Parameter order and default options for TUaClient.HistoryReadXxx
• New: UaStackUseDelphiMemoryFunctions - allows switching the stack to use it's own memory manager (by setting this to False)
• Fixed: Boolean values were kept as Byte values when coming from the UaStack
• Fixed: Monitoring ExpandedNodeId values
• Fixed: Variant array elements of varOleStr were not supported
• Fixed: Validate that ApplicationDescription is initialized (it must still be initialized in code)
• TUaDataValue.Create(Integer, ...) removed due to ambiguousness
• New: Equals method to all record types, to overcome a C++ compiler bug for Equal operator
• New: IUaNamespaceTable.ParseQualifiedNameArray & QualifedNameArrayToString
• New: IUaNamespaceTable.QualifiedNameToString (alias to UaQualifiedNameToString)

Changes to UA Client

• Fixed: Validate that the certificate and private key are set, if they are required in TUaClient
• Fixed: MemLeak in TUaClient.Reconnect
• Fixed: exceptions raised in TUaVariable.OnWriteValue will cancel the write and respond with a statuscode to the client
• Fixed: Prefer IPV4 for client socket connection (to enable connection to servers that don't support IPV6; 'localhost' in Windows 10 maps to IPV6 by default)
• Fixed: Reading QualifiedNames with invalid NamespaceIndex
• New: IUaSubscription.GetItems, GetDataItems & GetEventItems
• New: TUaSubscription.Create (overload) without arguments (to enable call without args in C++)
• Changed: TUaMonitoredDataItem.Create param changes
• Changed: TUaAddressSpace.Browse with default parameter values
• New: ProsysOPC.UaClient.Libs.h (to help importing the necessary libs to C++ Builder apps - see the UaCppSampleClient project for an example)

Changes to UA Server

• Fixed: Memory leak while loading SampleNamespace.xml
• Fixed: Do not allocate window handle for TUaServer in a DLL
• Fixed: TUaServer always creates PKI directory under application
• Improved: Check AccessLevel in TUaVariable.WriteAttribute for Value
• Changed: Made TUaNode.WriteAttribute protected to avoid it being used by the application
• New: ProsysOPC.UaServer.Libs.h (to help importing the necessary libs to C++ Builder apps - see the UaCppSampleServer project for an example)

Changes to Samples

• Fixed: AV in UaSampleClient
• Scale resized dialog buttons for High-DPI in the certificate validation prompt

Changes to Tutorials

• New: LessonUa1_UaClient project
• Online Client Tutorial updated to refer to the tutorial project, plus a few details clarified. New C++ sample code sections added as well.