OpenOpcUa

When I run my OpenopcUa-Client application for more than 5 minutes
I get this errorcodes several times, for almost each callback for my MonitoredItems
(about all two seconds)

...

OpenOpcUa:5752> OpcUa_Channel_ResponseAvailable: Request failed! (0x800A0000)

...

I use Windows7 and do not have installed a LDS! Is this the reason for the problem?
When I stop my Client, the OpenOpcUsServer has lots and lots of this output:
They seem to be kept until the Client is stopped!

...

|4376| 12:24:47.512Z OpcUa_SecureListener_BeginSendResponse: fail with 0x808A0000

|4376| 12:24:47.512Z OpcUa_Listener_BeginSendResponse failed (0x808A0000)

|4376| 12:24:47.612Z OpcUa_SecureListener_BeginSendResponse: fail with 0x808A0000

|4376| 12:24:47.612Z OpcUa_Listener_BeginSendResponse failed (0x808A0000)

...

At startup ofthe OpenOpcuaServer I get this errorcodes:

|5724| 12:31:20.147Z Your XML configuration file : .\Opc.Ua.SimulationNodeSet2.xml has been parsed

|5724| 12:31:20.147Z SetEvent.. StartSimulation

|5724| 12:31:20.147Z Your XML configuration file : .\OpenOpcUa.Simulation.xml has been parsed

|5724| 12:31:20.147Z Start Post-Parsing initialization

|5724| 12:31:20.147Z Start Updating inverse references

|5724| 12:31:20.157Z Start Updating UAVariablesBuiltinType

|5724| 12:31:20.157Z UpdateBuiltinType>You specify an incorrect NodeId: ns=0;i=887 BrowseName=EngineeringUnits

|5724| 12:31:20.157Z Configuration inconsistency.Error during Built-In type update Please check you XMLs files

|5724| 12:31:20.157Z Start Updating UAVariablesEncodeableObject

|5724| 12:31:20.157Z Warning FindBuiltinType ns=0;i=887 failed 0x803e0000

|5724| 12:31:20.177Z End Post-Parsing initialization

|5724| 12:31:20.187Z Your certificate validate your server

from: 01/08/2013 16:23:34.000

to: 06/07/2018 16:23:34.000

|5724| 12:31:20.187Z Could not add server certificate to the LDS store.

|5724| 12:31:20.187Z Server listening at urn:NB-21.RST-AUTOMATION.local:OpenOpcUa:4CEUAServer.

|5724| 12:31:20.187Z Press Q or q and Enter to exit.

|1016| 12:31:20.257Z Server Endpoint open. It's now listening at opc.tcp://NB-21.RST-AUTOMATION.local:16664/4CEUAServer with Binary Serializer

|6832| 12:31:21.243Z OpcUa_Socket_HandleEvent: OPCUA_SOCKET_EXCEPT_EVENT: 0

|6832| 12:31:21.243Z OpcUa_Channel_OnNotify: Underlying connection raised unexpected error event!

|1016| 12:31:21.245Z Could not connect to server.

|1016| 12:31:21.247Z DiscoverEndpoints>Channel connect to LDS failed 0x80050000

|1016| 12:31:21.252Z OpcUa_SecureConnection_Disconnect: Connection in invalid state!

|1016| 12:31:21.254Z DiscoverEndpoints failed uStatus=0x80050000

++++
The problem seems to be this (see above)

|6832| 12:31:21.243Z OpcUa_Socket_HandleEvent: OPCUA_SOCKET_EXCEPT_EVENT: 0

|6832| 12:31:21.243Z OpcUa_Channel_OnNotify: Underlying connection raised unexpected error event!

|1016| 12:31:21.245Z Could not connect to server.

+++
Will the installation of a LDS fix this problem?

with regards,
F.Haferkorn