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Classic OPC: DA, A&E, HDA, XML-DA, etc.
Questions about OPC Classic technologies and specifications, etc.
DataChangedEventHandler Exception System.Runtime.InteropServices.COMException (0x80040202): Exception from HRESULT: 0x80040202
Started By 
Stitch35 - 06/13/2018 - 03:59
Stitch35 - 06/13/2018 - 03:59
Read VARIANT while marshaling stream from x32 to x64
Started By telwin@tel-ster.pl - 05/24/2018 - 02:23
telwin@tel-ster.pl - 05/24/2018 - 02:23 32-bit client cannot connect to 64-bit server
Started By andrew.thomas@cogent.ca - 04/05/2018 - 05:21
andrew.thomas@cogent.ca - 04/05/2018 - 05:21 Unable to install OPC DA Automation 2.02 Source code
Started By mehta.nitin@gmail.com - 03/21/2017 - 17:14
mehta.nitin@gmail.com - 03/21/2017 - 17:14 OpcNetApi Group Subscription DataChangedEventHandler throws System.NullReferenceException
Started By christopherwong11@gmail.com - 02/02/2018 - 07:24
christopherwong11@gmail.com - 02/02/2018 - 07:24
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