Unexpected error processing response|OPC UA Standard|Forum|OPC Foundation

Hi,

I have big problem with OPC UA with a PLC 1500 (C# FW 4.6).

If we download in the plc a project with few DB and struct, all work (browse, read one ore more single node, read a struct that contains nodes).

If we download in the plc a project with a lot of DB and struct, we are not able to read any struct (while previously we succeeded).

Row that goes in error is:

session.ReadValue(nodeId);

type of session is   Opc.Ua.Client.Session

nodeID is   "ns=3;i=6001"

Analyzing I found that in TcpClientChannel.cs  BeginSendRequest

operation.MessageBody = null

Has anyone ever had a similar problem?

Thank you

Walter