Trouble reading OPC Server values with Labview

Hello there,
I am currently working with Siemens Equipment : a Simatic Microbox with an OPC Server.
I would like to read some variables' values provided by the OPC server with Labview 2012 (and DSC module), but I'm experiencing some difficulties.
I have set up my OPC Server as an I/O Server in a Labview projet. Then, I have created some Shared Values to treat them in Labview.
In the Distributed System Manager, I can read NI OPC Client Status :
Active -> true
Connected -> false
Enable logging diagnostic information -> false
OPC interface version -> OPC DA-3
Server ProgID -> OPC.SimaticNet.1
When I want to check any Shared Value, I have the comment : Server Failure.
I think DCOM/COM configuration of the client and the server are good (I can correctly read values with Siemens OPC Scout).
Maybe the issue comes from the connection between the OPC Server and Labview.
Has anyone had a similar problem ?
Thanks in advance,
Jeremy

You don't specify whether the server and the client are on the same PC or not.
I recently run in a situation where the Matrikon client was able to read from a remote server while the Labview program (using Datasocket) could not.
I suggest to try with Datasocket vi's to see what happens.
Paolo
LV 7.0, 7.1, 8.0.1, 2011
Attachments:
Read OPC variant.vi ‏17 KB

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