Hello support,
Windows 10 IOT Enterprise and Windows 10 Enterprise
QuickOPC 5.56.475.1
Visual Studio 2019
Exception: System.Runtime.InteropServices.COMException (0x800401F3): Invalid class string
I'm using code as the test example below (for years). Subscribing with the first method works well, the second one causes a COMexception. (test project attached)
This issue occurred after rebuilding my application. On every Win10 machine I test it on. I uninstalled the latest Windows security updates, without result.
Is there a solution to solve this issue?
Regards,
Goos van Beek
namespace ConsoleApp1{
#region usings
using System;
using OpcLabs.BaseLib.ComInterop;
using OpcLabs.EasyOpc.DataAccess;
#endregion
class Program{
private static readonly EasyDAClient Client = new EasyDAClient();
static void Main(){
Client.SubscribeItem(
"http://opcxml.demo-this.com/XmlDaSampleServer/Service.asmx",
"Dynamic/Analog Types/Int",
1000,
(_, args)=>Console.WriteLine(args.Vtq?.Value),
null);
// System.Runtime.InteropServices.COMException (0x800401F3): Invalid class string
Client.SubscribeItem(
string.Empty,
"http://opcxml.demo-this.com/XmlDaSampleServer/Service.asmx",
"Dynamic/Analog Types/Double",
VarTypes.Empty,
1000,
0.01F,
(_, args)=>Console.WriteLine(args.Exception ?? args.Vtq?.Value),
null);
Console.ReadKey();
}
}
}
[attachment=821]ConsoleApp1.zip[/attachment]
