Hi,

Yes, it has been set to true since I started to test connection to this server.

Best,
Ahmad

Hi,

No, I do not get any RejectedCertificates in OPC Foundation.

Best,
Ahmad

Hi,
Now I have sent the right and latest .der file in MachineDefault folder to our customer and he has put that in the Trust list but I am now getting a bit different but might relevant to the previous issue;
{
The SDK action called was "static Session.Create".
+ Following (1) events were gathered during the action on activity ID [9], in the order of first occurrence:
Exception: {Opc.Ua.ServiceResultException} Certificate chain not complete. SubjectName: O=Siemens, C=DE, CN=PLC-Model/OPCUAServerClient IssuerName: O=Siemens, C=DE, CN=Siemens TIA Project(Qiang-sha256)
+ The client method called was 'ReadMultiple'.
}

How this error should be handled?
found a similar post regarding the chain not complete but could figure out how the problem was solved for the person who was asking.

Best,
Ahmad

Hi,

I moved the certs and private subfolders (with .der and .pfx files inside) in the RejectedCertificates folder into the UA Applications folder in CertificateStores. Actually there was no UA Applications folder in CertificateStores folder. I created a folder and then moved what I said from RejectedCertificates to UA Applications folder. Then I deleted RejectedCertificates folder. Then I ran the client and it connected to the local server fine. Is this a reasonale approach finally?

I sent the same .der file in MachineDefault (that I will not delete anymore) to the customer to add it to his trust list.

Will revert if there are more questions.

Hi,

1- Ok, I see. I didn't delete the MachineDefault folder anymore. So the thumbprint will stay the same as you mentioned. But now I see that the same .DER file (with the same thumbprint) was thrown into the RejectedCertificates folder in CertificateStores. Actually the RejectedCertificates folder contains two sub-folders; certs wth the .der file and private folder with .pfx file. What should I do with these rejected ones now? should it be moved?
Another thing is that sometimes I noticed that an UA Applications folder (with certs subfolder and the same .der file as in certs subfolder of MachinDefault folder) also was created in CertificateStore folder but I don't see that folder to be thrown/created anymore.

2- I didn't mean to undermine your product. Just wanted to inform you that it might not be anything wrong on the server sides because I can connect to both servers that I am trying to connect with QuickOPC based client, with the other SDK based client and I have not set any certificates configuration as the servers side. But it might be the other client manage certificates automatically somehow.

3- Because the application crashes while running. For me to see what are exceptions I enabled the feature and the OPCForms was one of the exceptions I noticed.
I have installed all QuickOPC with using nuget package manager and I was consistent on that in the entire work. That's why I am surprised why it is complaining about that. But as you mentioned I need to probably continue on that.

Best,
Ahmad