I have a similar problem when connecting to a B&R PLC.
When connecting with the UaExpert from Unified Automation, everything works fine. But when I try with the Prosys Java Client SDK, I get the error message below:
——————————————————————————————————————————————————
04/02/2015 09:48:17.189 ERROR The endpoint received from GetEndpoints is not in the endpoints in CreateSessionResponse. Endpoint=EndpointDescription: EndpointDescription
SecurityPolicyUri=http://opcfoundation.org/UA/SecurityPolicy#None
EndpointUrl=opc.tcp://192.168.60.80:4840
UserIdentityTokens=class org.opcfoundation.ua.core.UserTokenPolicy[2]
[0]=UserTokenPolicy
SecurityPolicyUri=null
TokenType=UserTokenType
ordinal=0
name=Anonymous
IssuedTokenType=null
IssuerEndpointUrl=null
PolicyId=0
[1]=UserTokenPolicy
SecurityPolicyUri=null
TokenType=UserTokenType
ordinal=1
name=UserName
IssuedTokenType=null
IssuerEndpointUrl=null
PolicyId=1
SecurityLevel=0
ServerCertificate=null
Server=null
TransportProfileUri=http://opcfoundation.org/UA-Profile/Transport/uatcp-uasc-uabinary
SecurityMode=MessageSecurityMode
ordinal=1
name=None

Invalid Endpoint: com.prosysopc.ua.client.InvalidServerEndpointException: Failed to create session channel to server: : opc.tcp://192.168.60.80:4840 [http://opcfoundation.org/UA/SecurityPolicy#None,None] ServiceResult=Bad_UnexpectedError (0x80010000) “An unexpected error occurred.”
Caused by: org.opcfoundation.ua.common.ServiceResultException: Bad_UnexpectedError (code=0x80010000, description=”The Endpoints received from GetEndpoints differ from the Endpoints received from CreateSession”)

Endpoints supported by the server (by Discovery Service)
opc.tcp://192.168.60.80:4840 [http://opcfoundation.org/UA/SecurityPolicy#None, None]
opc.tcp://192.168.60.80:4840 [http://opcfoundation.org/UA/SecurityPolicy#Basic128Rsa15, SignAndEncrypt]
opc.tcp://192.168.60.80:4840 [http://opcfoundation.org/UA/SecurityPolicy#Basic256, SignAndEncrypt]

*** NOT connected to: opc.tcp://192.168.60.80:4840
——————————————————————————————————————————————————

As URI, I’m using “opc.tcp://192.168.60.80:4840”. What do I have to change in order to be able to connect to the PLC?

Thank you for your answer.

I tried with the following code, but still no sucess
—————————————————————————
EndpointDescription[] endpoints = client.discoverEndpoints();
client.setEndpoint(endpoints[0]);
client.connect();
—————————————————————————
I get the following error message:

Using SecurityPolicy http://opcfoundation.org/UA/SecurityPolicy#None
com.prosysopc.ua.client.ConnectException: Failed to create session channel to server: : opc.tcp://192.168.60.80:4840 [http://opcfoundation.org/UA/SecurityPolicy#None,None] ServiceResult=Bad_SecurityModeRejected (0x80540000) “The security mode does not meet the requirements set by the Server.”
Caused by: org.opcfoundation.ua.common.ServiceResultException: Bad_SecurityModeRejected (code=0x80540000, description=”Requested endpoint is not found on the server”)

When using discover endpoints, I get the following available endpoints:
– Endpoints supported by the server (by Discovery Service)
– opc.tcp://192.168.60.80:4840 [http://opcfoundation.org/UA/SecurityPolicy#None, None]
– opc.tcp://192.168.60.80:4840 [http://opcfoundation.org/UA/SecurityPolicy#Basic128Rsa15, SignAndEncrypt]
– opc.tcp://192.168.60.80:4840 [http://opcfoundation.org/UA/SecurityPolicy#Basic256, SignAndEncrypt]

So connecting to “opc.tcp://192.168.60.80:4840” should work?

I did several tests today.
First, I tried to connect to the B&R OPC UA server using the UaExpert (Unfied Automation) using the same Endpoint as in my Java program. I’m using user „anonymous“ and security mode „none“. I got a Certificate warning, but when selecting „Accept“, the connection is established correctly. I got exactly the same behaviour with the OPC Client Example program from the official OPC Foundation. Both are working fine.
I did also call the vendor of the PLC, and he confirmed that the Endpoint I’m using is correct and said that the server is officially listed as certified by the OPC Foundation.
So, to my, it looks like there is something wrong/missing in the „SampleConsoleClient“ example or in the SDK itself. I would expect that in the Prosys example, the function „onValidate()“ of „MyCertificateValidationListener“ is called because of the unknown certificate, but it does not happen.
What else can I try?

I understand what you mean, but the values you are refering to are from a different person. I just added my questions to this topic since I had the same error message as the creator of this issue.
I have an external PLC connected with Ethernet which has no hostname assigned. The PLC always responds with its IP Adress in the Endpoint definition.

Furthermore, the OPC UA Server from B&R is certified by the OPC foundation, so this should work fine…
(https://opcfoundation.org/products/view/179)

And the Sample OPC client distributed by the OPC Foundation is able to connect to the OPC Server of the Server!
(https://opcfoundation.org/developer-tools/developer-kits-unified-architecture/sample-applications/)

I just don’t know how to proceed, since conection to the OPC Server works fine with all other tools I have. I get this error with the “SampleConsoleClient” only!

Hi Jouni,

What was the outcome out of the B&R problem?
I have exact the same problem then described by Beat.

I can connect to B&R PLC by UA-Expert with Security mode none_none and anonymous.

But with the Java SDK client I cannot connect to the B&R PLC because of follow error:
2016-02-23 13:22:53,976 [main] ERROR com.buhlergroup.mma.opcuaclasses.client.connection.OpcUaConnectionSecurityNone – com.prosysopc.ua.client.InvalidServerEndpointException: Failed to create session channel to server: : opc.tcp://192.168.1.175:48020 [http://opcfoundation.org/UA/SecurityPolicy#None,None] ServiceResult=Bad_UnexpectedError (0x80010000) “An unexpected error occurred.”

Thank you