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opcrcw.da.dll for 64 Bit?

Carsten Buchloh

Posts: 1

09/15/2020 - 06:32

Hi from Germany,

I have to update some OPC samples, written in C# and Visual Basic for .Net.

These older .Net samples, using OPC DA, are compiled for x86 and they are running with the following DLL:

opcrcw.da.dll (Version 3.0.101.0, Description: OPC Data Access 3.00 .NET Wrapper)

The opcrcw.da.dll is a 32 bit DLL.

The task is to compile the samples for x64 (or AnyCPU).

Question:
Is the opcrcw.da.dll available for 64 bit?

If yes, where?

Thanks a lot,

Carsten

Randy Armstrong

Posts: 1675

09/16/2020 - 06:03

The latest RCW is architecture independent:

2.01.108

Release

OPC NET RCW (NuGet/ZIP)

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

You need to upgrade.

Sheng Ji

Posts: 3

01/26/2021 - 18:56

Hi Carsten Buchloh，

Did you update opcrcw.da.dll?

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

EuroEager2008

Posts: 12

01/13/2023 - 06:07

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?

Randy Armstrong

Posts: 1675

01/14/2023 - 17:18

You need to make sure you install the x64 version of the proxy stubs in Core Components (OPC Core Components Redistributable (x64) 3.00.108.msi).

Johan Van den Broek

Posts: 1

01/26/2023 - 00:54

Randy Armstrong said
You need to make sure you install the x64 version of the proxy stubs in Core Components (OPC Core Components Redistributable (x64) 3.00.108.msi).

Thanks Randy, this worked for me!

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