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06/04/2018
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groupRead.DataChanged += new Opc.Da.DataChangedEventHandler(groupRead_DataChanged);
System.Runtime.InteropServices.COMException (0x80040202): Exception from HRESULT: 0x80040202
at OpcRcw.Comn.IConnectionPoint.Advise(Object pUnkSink, Int32& pdwCookie)
at OpcCom.ConnectionPoint.Advise(Object callback)
at OpcCom.Da.Subscription.Advise()
at OpcCom.Da.Subscription.add_DataChanged(DataChangedEventHandler value)
at Opc.Da.Subscription.add_DataChanged(DataChangedEventHandler value)
at da.Form1.ConnectionToOPCServer()
Base on opc.NetApi
1.It can connect to server but it cannot get value form tag
2.OPCProxy.dll is same version between server and client
3. I run with administrator
4.I test with application, it is work
05/30/2017
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This appears to be a DCOM permission problem.
The account that the Server is running under needs access to the Client process.
07/13/2018
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Hello Randy,
I am having same issue. May I ask you for a quick tip, how to “The account that the Server is running under needs access to the Client process.”
I created on both systems same user added to Administrators group. Is there something else I need to do?
I went through DCOM configuration and it seems to be OK.
Thank you
BR Rudo
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