opcrcw.da.dll for 64 Bit?|Classic OPC: DA, A&E, HDA, XML-DA, etc.|Forum|OPC Foundation

sji2@ra.rockwell.com said
Hi Carsten Buchloh，

Did you update opcrcw.da.dll?

How to use OpcComRcw.2.1.108.nupkg to get opcrcw.da.dll?

  

Randy Armstrong said
The latest RCW is architecture independent:

2.01.108

Release

OPC NET RCW (NuGet/ZIP)

https://opcfoundation.org/deve.....omponents/

You need to upgrade.

  

Using 2.01.109.57 from a console compiled with Any CPU or x64 and it fails, working ok if console is x86.
Code as:
Type comServerType = Type.GetTypeFromProgID("SomeOPCDAServerProgId");
comServer = (OpcRcw.Da.IOPCServer)Activator.CreateInstance(comServerType);
Last line throws:
System.InvalidCastException
HResult=0x80004002
Message=Unable to cast COM object of type 'System.__ComObject' to interface type 'OpcRcw.Da.IOPCServer'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{39C13A4D-011E-11D0-9675-0020AFD8ADB3}' failed due to the following error: Class not registered (0x80040154 (REGDB_E_CLASSNOTREG)).

I cannot find the interface in registry other than (for IOPCServer):

Computer\HKEY_CLASSES_ROOT\WOW6432Node\Interface\{39C13A4D-011E-11D0-9675-0020AFD8ADB3}
Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{39C13A4D-011E-11D0-9675-0020AFD8ADB3}
Computer\HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Classes\Interface\{39C13A4D-011E-11D0-9675-0020AFD8ADB3}

Should they have been registered in Computer\HKEY_CLASSES_ROOT\Interface as well? By the server installation?