OPC Classic Core Components
Overview
These packages provide the OPC Classic (COM/DCOM) proxy stub libraries and the .NET wrappers that allow
.NET applications to communicate with OPC Classic applications.
Release Notes
The 107 release has a number of significant improvements:
• All binaries are signed with SHA256. For backwards compatibility the binaries also have a SHA1
signature, however, SHA256 is now required to pass Windows Authenticode verification.
• The dependencies on .NET Framework have been removed from the Core Components Installers and
Merge Modules. The x64 Installer always installs the x86 version so only one version of the MSI is
required for any system (both can still be installed but it is redundant).
• The .NET RCW and .NET API assemblies are now distributed as nuget packages which support .NET
3.5/2.0 and .NET 4.0. The sample client code illustrates how to use these packages. The Core
Components Installers no longer install the assemblies the GAC.
• The Core Components Merge Modules now use the MSI Component IDs that match the 105 release.
This should prevent necessary components from being uninstalled when an application that uses the
Merge Modules is uninstalled. This problem will still exist if a product uses the 106 release, however,
there should be a smaller number of those products. Version 106 has been removed from the
website because of the inconsistent Component IDs.
Contents
The OPC Core Components includes the following packages:
Package
Contents
OPC COM ProxyStub MergeModule (x86)
Installs the DCOM proxy/stub libraries for all of the OPC
Classic specifications and the OPCEnum service.
If the ‘OPC_INSTALL_SDK’ property is set to true the
headers for x86 and x64 development are installed as
are the nuget packages needs for development with
.NET.
OPC COM ProxyStub MergeModule (x64)
Installs the 64-bit versions of the DCOM proxy/stub
libraries for all of the OPC Classic specifications and a
component that allows OPCEnum to see x64 bit servers.
OPC Core Components Redistributable (x86)
Installs the OPC COM ProxyStub MergeModule (x86).
If the ‘Install Headers’ option is checked the headers for
x86 and x64 development are installed as are the nuget
packages needs for development with .NET.
OPC Core Components Redistributable (x64)
Installs OPC COM ProxyStub MergeModule (x86) and
OPC COM ProxyStub MergeModule (x64).
If the ‘Install Headers’ option is checked the headers for
