Hi,
We got this exception while trying to connect to a local OPC Server (Matrikon OPC DA Tunneller). See below. When connecting with Matrikon OPC Explorer, browsing is possible and there is no error message.
Please advise.
Thank you.
Michael
Exceptions
Type: OpcLabs.BaseLib.Browsing.BrowseException
Data:
HelpLink:
HResult: -2146233088 (0x80131500)
InnerException:
OpcLabs.BaseLib.Runtime.InteropServices.ExtendedCOMException (0x800401F3): Invalid class string
+ This error usually means that the ProgID of the OPC Server you used is not registered on the specified computer.
+ The server class used was 'Tunneller:172.31.250.199:OPC.SimaticNET.', the machine name was ''.
+ Execution details: HasNativeClient=True, HasNetApiClient=True, ProcessBitness=32.
+ The client method called (or event/callback invoked) was 'BrowseNodes'.
Data:
OpcLabs.EasyOpc.Implementation.ErrorEnhancement.Processed: True
OpcLabs.EasyOpc.Implementation.DAErrorEnhancement.Processed: True
ErrorCode: -2147221005
HelpLink:
HResult: -2147221005 (0x800401f3)
InnerException:
Message:
Invalid class string
+ This error usually means that the ProgID of the OPC Server you used is not registered on the specified computer.
+ The server class used was 'Tunneller:172.31.250.199:OPC.SimaticNET.', the machine name was ''.
+ Execution details: HasNativeClient=True, HasNetApiClient=True, ProcessBitness=32.
+ The client method called (or event/callback invoked) was 'BrowseNodes'.
Source:
StackTrace:
TargetSite:
XML Qualified Name 2:
opcfoundation.org/DataAccess/:E_FAIL.0x800401F3
IsEmpty: False
Name: E_FAIL.0x800401F3
Namespace:
opcfoundation.org/DataAccess/
Message: Problem browsing OPC Data Access (OPC-DA) branches.
Source:
StackTrace:
TargetSite:
