Just installed QuickOPC Version 2016.2.
I get the same exception in Delphi XE4 in the module _EasyUAClient.SubscribeMonitoredItem, row:
WriteLn (eventArgs.Arguments.NodeDescriptor.ToString,':',eventargs.AttributeData.ToString)

So I can't see the result.
Single read works.
The re-import the Type Libraries didn't help.

Please advise...

Hello i am using Delphi XE 7 and try to test your OP-Example óf UADocExamples.

If i try to Monitore items i always get an exception in

WriteLn(eventArgs.Arguments.NodeDescriptor.ToString, ': ',
eventArgs.AttributeData.ToString);
(see attached file)

I also get the exception if i use
WriteLn(eventArgs.Arguments.NodeDescriptor.ToString);
or
WriteLn(eventArgs.AttributeData.ToString);
instead

Only if i use WriteLn(eventArgs.Arguments.ToString);
I can see the results.

Can you tell me how i can get only the value of the changed item and if possible not as string but as variant?

Kind regads
Dirk

Hello,

i am using Delphi XE 7 and try to run your example UADocExamples

In Module _EasyUAClient.SubscribeMonitoredItem.Main.inc i always get an error

Exception in Class $C0000005 : Access Violation at 0x005e8132: read of adress 0x8f621b56


This happens always in line 25

WriteLn (eventArgs.Arguments.NodeDescriptor.ToString,':',eventargs.AttributeData.ToString)


I also get an exception if i use
WriteLn (eventArgs.Arguments.NodeDescriptor.ToString)
or
WriteLn (eventargs.AttributeData.ToString)
instead.

But i get no exception if use writeln(eventargs.Arguments.ToString) instead.


What can i do to run this example ?


Second question :

I want to get the value of the changed node as Variant an not as string is there a property that delivers variant?

Kind regards Dirk.