Hello.

For this, use the CallMethod overload that accepts types instead of type codes: 

opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Late...deDescriptor,Object,Type).html .

For the particular argument, you would use "typeof(string[])".

Best regards

Hi,
I attached the 2 log files captured with WireShark:
-UAEXPERT.pcapng: traced with the successful call made by UaExpert
-software.pcapng: traced with the call made by our software with the OPClabs libraries

N.B. the OPC-UA server port is 4842 to be able to view the logs on WireShark.

I think the problem looking at the 2 traces is due to the fact that on 3 arguments you have to pass an "Array of String" but currently I am passing a "String".
 
How can you map and then pass an "Array of String" since in the "TypeCode" enumerator it does not exist?
Can you help me?
Thanks

Hello.

Can you please collect network communication using WireShark and provide it to us for analysis? One run with successful method call (UaExpert), other run with the failure (QuickOPC). 

Some helpful links:

• Analyzing OPC UA Communications with Wireshark:  opcconnect.opcfoundation.org/2017/02/analyzing-opc-ua-communications-with-wireshark/
• OPC UA & Wireshark:  www.prosysopc.com/blog/opc-ua-wireshark/

Best regards

 

Hi,
Yes correct, we also tried with Double but the result is the same.
See attached log.

Hello.

In OPC UA, "Duration" data type derives from Double. Therefore, the type you set for ExpectedCycleTime should be Double, not Int16.

Best regards
 

Hi,
Yes if I send the call from UAExpert as per the screenshot it goes through successfully.
Instead if I send the call using the "CallMethod" of the OPC-UA client it doesn't work.
Below is the code:

 List<o-bject> inputList = new List<o-bject>;();
 List<TypeCode> typeList = new List<TypeCode>;();
 int i = 1;
 foreach (RunVariableVM item in _devModel.RunVariableList.FindAll(x => x.nodeCall == rVarTMP.nodeCall && x.structuredDataType == StructType.INPUTARGUMENTS))
 {
     typeList.Add(item.GetTypeCode);
     inputList.Add(item.Value);
     Program.LOG.Verbose("OPCSCH", "Add input argument[" + i + "] with name:" + item.Name + "|value:" + item.Value + "|type:" + item.GetTypeCode);
     i++;
 }
 object output = null;
 if (inputList.Count == 0)
 {
     Program.LOG.Verbose("OPCSCH", "Send call:" + rVarTMP.Name + " without input arguments");
     output = clientOPCUA.CallMethod(_devModel.UAEndpointDesc, rVarTMP.node, rVarTMP.nodeCall);
 }
 else
 {
     Program.LOG.Verbose("OPCSCH", "Send call:" + rVarTMP.Name + " with input arguments");
     output = clientOPCUA.CallMethod(_devModel.UAEndpointDesc, rVarTMP.node, rVarTMP.nodeCall, inputList.ToArray(),typeList.ToArray());
 }
 int outIndex = 0;
 foreach (var item in output)
 {
     Program.LOG.Verbose("OPCSCH", "Send call:" + rVarTMP.Name + " output(" + outIndex + "):" + item.ToString());
     string nameVar = String.Format("{0}_OUT{1:0000}", rVarTMP.Name, outIndex);
     StructuredDataAdd(nameVar, item, VarType.CALL);
     outIndex += 1;
 }
 Program.LOG.Verbose("OPCSCH", "Send call:" + rVarTMP.Name + " successfull!");

I have also attached the log.

Do you have any ideas?

Thanks

Hello,
it might be a different argument that is causing this, not the one with Duration. I need some more information from you:

1. Do you succeed when calling the method from UaExpert?
2. Please post here the piece of code that calls the method, together with enough context that allows to determine which data types are the values that you pass in.

Best regards
 

I developed an application in C# with the OPC-UA Client following what is described in the online guide at this link:

opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Late...all%20a%20single%20method.html

Also I tried with the OPC-UA demo server and it works correctly.
However, I have a customer with a machine that implement Euromap77 (OPC-UA) with the following call(see image below)

 

Here it does not work(CallMethod) because I always get the BadInvalidArgument exception.
I think the cause is because I do not pass the "ExpectedCycleTime" argument with the correct data type (Duration).
"Duration" is not a standard data type but a special data type defined in OPC-UA server (see image below)

 

How can I pass this data type in a call (CallMethod)? Is it possible? Can you help me?
Thanks