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Classic OPC: DA, A&E, HDA, XML-DA, etc.
Questions about OPC Classic technologies and specifications, etc.
.NET OPC DA Sample Server build error LNK1169/LNK2005
Started By
Ibrahim Ghoddan - 08/15/2018 - 01:23
Ibrahim Ghoddan - 08/15/2018 - 01:23
Marshalling and unmarshalling a VARIANT of IOPCSyncIO::Write
Started By
Rodrigo De Francisco - 08/09/2018 - 04:01
Rodrigo De Francisco - 08/09/2018 - 04:01
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
OpcNetApi Group Subscription DataChangedEventHandler throws System.NullReferenceException
Started By
Chris Wong - 02/02/2018 - 07:24
Chris Wong - 02/02/2018 - 07:24Replies: 2
Views: 3164
Exception thrown: 'System.Runtime.InteropServices.COMException' in OpcNetApi.Com.dll
Started By
Stitch35 - 07/22/2018 - 22:20
Stitch35 - 07/22/2018 - 22:20
Read Multiple Tags/Items at once using OPCDAAUTO.DLL Group Object Method - SyncRead
Started By
Vadim Komarov - 06/28/2018 - 08:05
Vadim Komarov - 06/28/2018 - 08:05
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