I tried your suggestion but to no avail.

I added
ReadArgumentCk.ReadParameters.MaximumAge = 0
When I go to assign the variable xxxx = resultCheck.value
the error of "function, argument value, type or count is invalid" returns to me inexorably

I also tried to do a single node reading with this code

oClient = CREATEOBJECT ("OpcLabs.EasyOpc.UA.EasyUAClient")
MESSAGEBOX (oPCUA.ReadValue ("opc.tcp: //10.0.0.205: 48010", "nsu = urn: Exor: OPCUAServer: JMobile; ns = 2; s = Tags.Application / GVL / Data_Exchange_Scada / Put_Data_PiecesCounter")

but the same mistake always comes back to me.

In the attached screen shoots you can see how with the DEMO application I correctly read the value of the node,
I don't understand what it can be

Yes I checked with the DEMO-UA app coming with the installation of Quickopc and all it's ok with this app, I don't understand what is the problem

In the Attachement yiu Can see that the object valueresultcheck count prooerty is set to 1 but the item is (none) and nthe value property of resultcheck is (none) too

I tried .Value and .value but not workoing too, see the attachement, the property Succeeded is True but no oher prorperty show
????

If I print to screen vartype(resultCheck) the value is 'O' (object) and it0s correct because reslutChe k is an Object, but if I print to the screen vartype(resultCheck.Value) it return an error , exactly Function argument value, type or count is invalid , it seem that the .Value doesn't exist

Thanks,
the language is Microsfot Visual Foxpro, the variable 'valore' is used in a statement and foxpro if not decalred assign the type as the value assigned to it, but I try to declare the variable valore as String, as number, but no change , same error as not declared.
It seem that ther's no Value property in the object I think, but I don't understand why Exeption is empty , error is empty and succeeded is true; ther's some other property Can I check?