Hi,

I am trying to connect with a remote OPC UA Server (KepServer). The endpoint URL is: "opc.tcp://DEV2017:49320".
When my OPC Client tries to connect, I get the following error. Any idea why?

Thank you.

"No connection could be made because the target machine actively refused it 192.168.1.46:49320
+ This is a deducted base exception."

Exceptions

Type: OpcLabs.BaseLib.Browsing.BrowseException
Data:
HelpLink:
HResult: -2146233088 (0x80131500)
InnerException:
OpcLabs.EasyOpc.UA.Engine.UAEngineException: UA SDK error (Opc.UA.ServiceResult=0x80820000) in 'DiscoveryClient.GetEndpoints'. OPC UA service result - {BadTcpInternalError}. Error establishing a connection.
+ The error occurred when preselecting an endpoint for discovery URL "opc.tcp://DEV2017:49320".
+ Some possible causes of this error are that the OPC-UA server is not running, or is not configured to listen on the specified port. Also, the network connection may be broken (cable unplugged?).
+ The endpoint URL string used was "opc.tcp://DEV2017:49320".
+ The client method called (or event/callback invoked) was 'BrowseMultiple'. ---> OpcLabs.EasyOpc.UA.UAServiceException: OPC UA service result - {BadTcpInternalError}. Error establishing a connection.
--> {BadTcpInternalError}. An unexpected error occurred while connecting to the server.
--> {Bad}. No connection could be made because the target machine actively refused it 192.168.1.46:49320. ---> OpcLabs.BaseLib.Portable.CustomException: No connection could be made because the target machine actively refused it 192.168.1.46:49320
+ This is a deducted base exception.
--- End of inner exception stack trace ---
--- End of inner exception stack trace ---
Activity Trace:
Following (7) events were gathered during the action on activity ID [23], in the order of first occurrence:
SDK trace: GetEndpoints Called. RequestHandle=1, PendingRequestCount=1
3*[8] Exception: {System.Net.Sockets.SocketException} No connection could be made because the target machine actively refused it
[17] Exception: {Opc.Ua.ServiceResultException} An unexpected error occurred while connecting to the server.
Exception: {Opc.Ua.ServiceResultException} Error establishing a connection.
SDK trace: GetEndpoints Completed. RequestHandle=1, PendingRequestCount=0, StatusCode=Bad
Events starting with activity ID in [] may not necessarily be related to the current action.

Data:
ErrorId: OpcLabs.UAEngine=1
7b4d9f28-22a8-41d6-93ea-e4d8c2a75da8:
((23, 1), Opc.Ua.TraceEventArgs)
((8, 0), System.Runtime.ExceptionServices.FirstChanceExceptionEventArgs)
((8, 0), System.Runtime.ExceptionServices.FirstChanceExceptionEventArgs)
((8, 0), System.Runtime.ExceptionServices.FirstChanceExceptionEventArgs)
((17, 0), System.Runtime.ExceptionServices.FirstChanceExceptionEventArgs)
((23, 1), System.Runtime.ExceptionServices.FirstChanceExceptionEventArgs)
((23, 1), Opc.Ua.TraceEventArgs)
c3c0e69e-bf8f-4bfa-8e93-816783737e55: 23
OpcLabs.EasyOpc.UA.Implementation.ErrorEnhancingEasyUAClient.Processed: True
Error Code: 1
HelpLink:
HResult: -2146232832 (0x80131600)
InnerException:
OpcLabs.EasyOpc.UA.UAServiceException: OPC UA service result - {BadTcpInternalError}. Error establishing a connection.
--> {BadTcpInternalError}. An unexpected error occurred while connecting to the server.
--> {Bad}. No connection could be made because the target machine actively refused it 192.168.1.46:49320. ---> OpcLabs.BaseLib.Portable.CustomException: No connection could be made because the target machine actively refused it 192.168.1.46:49320
+ This is a deducted base exception.
--- End of inner exception stack trace ---
Data: ErrorId: Opc.UA.ServiceResult=0x80820000
Help Link:
HResult: -2146232832 (0x80131600)
InnerException:
OpcLabs.BaseLib.Portable.CustomException: No connection could be made because the target machine actively refused it 192.168.1.46:49320
+ This is a deducted base exception.
Data: ErrorId: {027F782F1C}
HelpLink:
HResult: -2146232832 (0x80131600)
InnerException:
Message:
No connection could be made because the target machine actively refused it 192.168.1.46:49320
+ This is a deducted base exception.
Source:
StackTrace:
TargetSite:
Internal Code: 2156003328
Message:
OPC UA service result - {BadTcpInternalError}. Error establishing a connection.
--> {BadTcpInternalError}. An unexpected error occurred while connecting to the server.
--> {Bad}. No connection could be made because the target machine actively refused it 192.168.1.46:49320.
Service Result: BadTcpInternalError
Additional Info:
Description: Error establishing a connection.
Inner Result: BadTcpInternalError
Additional Info:
>>> An unexpected error occurred while connecting to the server.
--- at Opc.Ua.Bindings.TcpAsyncOperation`1.End(Int32 timeout)
--- at Opc.Ua.Bindings.TcpClientChannel.OnConnectOnDemandComplete(Object state)
Description: An unexpected error occurred while connecting to the server.
Inner Result: Bad
Additional Info:
>>> No connection could be made because the target machine actively refused it 192.168.1.46:49320
--- at System.Net.Sockets.Socket.InternalEndConnect(IAsyncResult asyncResult)
--- at System.Net.Sockets.Socket.EndConnect(IAsyncResult asyncResult)
--- at Opc.Ua.Bindings.TcpMessageSocket.EndConnect(IAsyncResult result)
--- at Opc.Ua.Bindings.TcpClientChannel.OnConnectComplete(IAsyncResult result)
Description: No connection could be made because the target machine actively refused it 192.168.1.46:49320
Inner Result:
Qualified Symbolic ID:
Expanded Text:
Is Null: True
Name:
Namespace Index: 0
Namespace URI:
Namespace URI String:
Standard Name:
Status Code: Bad
Code Bits: 32768
Code Bits Symbol: Bad
Condition: 0
Flag Bits: 0
Has Data Value Info: False
Info Type: NotUsed
Internal Value: 2147483648
Is Bad: True
Is Good: False
Is Uncertain: False
Limit Info: None
Overflow: False
Semantics Changed: False
Severity: BadOrFailure
Status Info: Error
Structure Changed: False
Text: {Bad}. No connection could be made because the target machine actively refused it 192.168.1.46:49320.
Qualified Symbolic ID:
Expanded Text:
Is Null: True
Name:
Namespace Index: 0
Namespace URI:
Namespace URI String:
Standard Name:
Status Code: BadTcpInternalError
Code Bits: 32898
Code Bits Symbol: BadTcpInternalError
Condition: 130
Flag Bits: 0
Has Data Value Info: False
Info Type: NotUsed
Internal Value: 2156003328
Is Bad: True
Is Good: False
Is Uncertain: False
Limit Info: None
Overflow: False
Semantics Changed: False
Severity: BadOrFailure
Status Info: Error
Structure Changed: False
Text:
{BadTcpInternalError}. An unexpected error occurred while connecting to the server.
--> {Bad}. No connection could be made because the target machine actively refused it 192.168.1.46:49320.
Qualified Symbolic ID:
Expanded Text:
Is Null: True
Name:
Namespace Index: 0
Namespace URI:
Namespace URI String:
Standard Name:
Status Code: BadTcpInternalError
Code Bits: 32898
Code Bits Symbol: BadTcpInternalError
Condition: 130
Flag Bits: 0
Has Data Value Info: False
Info Type: NotUsed
Internal Value: 2156003328
Is Bad: True
Is Good: False
Is Uncertain: False
Limit Info: None
Overflow: False
Semantics Changed: False
Severity: BadOrFailure
Status Info: Error
Structure Changed: False
Text:
{BadTcpInternalError}. Error establishing a connection.
--> {BadTcpInternalError}. An unexpected error occurred while connecting to the server.
--> {Bad}. No connection could be made because the target machine actively refused it 192.168.1.46:49320.
Service Target Site: T End(Int32)
DeclaringType: Opc.Ua.Bindings.TcpAsyncOperation`1[T]
Module: Opc.Ua.Core.dll
Assembly: Opc.Ua.Core, Version=1.3.342.0, Culture=neutral, PublicKeyToken=6faddca41dacb409
CustomAttributes:
FullyQualifiedName: C:\Program Files (x86)\Control-See\EBO-OPC Client\BIN\Opc.Ua.Core.dll
MDStreamVersion: 131072
MetadataToken: 1
ModuleHandle: System.ModuleHandle
MDStreamVersion: 131072
ModuleVersionId: cc819e15-c1f0-4cd1-a4cc-c7b59fd7b4d5
Name: Opc.Ua.Core.dll
ScopeName: Opc.Ua.Core.dll
Source: Opc.Ua.Core
Stack Trace:
at Opc.Ua.Bindings.TcpAsyncOperation`1.End(Int32 timeout)
at Opc.Ua.Bindings.TcpClientChannel.EndSendRequest(IAsyncResult result)
at Opc.Ua.Bindings.TcpTransportChannel.EndSendRequest(IAsyncResult result)
at Opc.Ua.Bindings.TcpTransportChannel.SendRequest(IServiceRequest request)
at Opc.Ua.DiscoveryClient.GetEndpoints(RequestHeader requestHeader, String endpointUrl, StringCollection localeIds, StringCollection profileUris, EndpointDescriptionCollection& endpoints)
at OpcLabs.EasyOpc.UA.Toolkit.Sdk.ToolkitDiscoveryClient.OpcLabs.EasyOpc.UA.Toolkit.ClientServer.ISdkDiscoveryClient.GetEndpoints(String endpointUrl, StringCollection sdkProfileUris)
at OpcLabs.EasyOpc.UA.Toolkit.Sdk.ClientUtils.<>c__DisplayClass55_0.<SelectEndpointInternal>b__2()
at OpcLabs.EasyOpc.UA.Toolkit.UAEngineBase.PerformSdkAction(UASdkCallType callType, Func`1 usingFunction, String name, Action sdkAction)
TargetSite:
Message:
UA SDK error (Opc.UA.ServiceResult=0x80820000) in 'DiscoveryClient.GetEndpoints'. OPC UA service result - {BadTcpInternalError}. Error establishing a connection.
+ The error occurred when preselecting an endpoint for discovery URL "opc.tcp://DEV2017:49320".
+ Some possible causes of this error are that the OPC-UA server is not running, or is not configured to listen on the specified port. Also, the network connection may be broken (cable unplugged?).
+ The endpoint URL string used was "opc.tcp://DEV2017:49320".
+ The client method called (or event/callback invoked) was 'BrowseMultiple'.
Source:
Stack Trace:
== Activity Trace ==
Following (7) events were gathered during the action on activity ID [23], in the order of first occurrence:
SDK trace: GetEndpoints Called. RequestHandle=1, PendingRequestCount=1
3*[8] Exception: {System.Net.Sockets.SocketException} No connection could be made because the target machine actively refused it
[17] Exception: {Opc.Ua.ServiceResultException} An unexpected error occurred while connecting to the server.
Exception: {Opc.Ua.ServiceResultException} Error establishing a connection.
SDK trace: GetEndpoints Completed. RequestHandle=1, PendingRequestCount=0, StatusCode=Bad
Events starting with activity ID in [] may not necessarily be related to the current action.

TargetSite:
Message: Problem browsing OPC Unified Architecture nodes.
Source:
StackTrace:
TargetSite:


Michael