Problems upgrading from DSC 7.1 to 8.0

[mazz]

I am trying to upgrade from Labview 7.1 to Labview 8.0. In Labview 7.1 I have 2 applications that talk to OPC servers that exist on the network and read data from them using the Read Multiple Tags vi. When I started the vi in Labview 8.0 it found the old Tag vis but reported them as no longer supported. Therefore I am now attempting to use the new DSC 8.0 to perform the same function.

Since it is all different I am trying to just set up a few shared variables from 1 of the networked OPC servers to get a fell for how it works with the following steps.

1. Start a new project
2. Right Click My Computer in the project and select NEW>>IO Server
3. Select OPC
4. BROWSE->NETWORK
5. Select OPC server on network
6. TOOLS>>DSC MODULE>>Multiple Variable Editor
**** IN VARIABLE EDITOR****
7. FILE>>OPEN PROJECT LIBRARY and select the library associated with the OPC server
8. EDIT>>Create Bindings
9. Select the OPC server and then ADD a group of variables from it
10. HIT OK
11. HIT APPLY.
12. Close Multiple Variable Editor
**********************
13. Right Click on library associated with the OPC editor and hit DEPLOY ALL. (This is the only way I could get them to show up in the Variable Monitor)
14. TOOLS>>DSC Module>>Monitor Variables
******IN Variable Monitor*******
15. Select Library on left of variable monitor and double click on 1 or 2 variables.
16. THEY REPORT SERVER FAILURE UNDER THE QUALITY COLUMN. There are 4 different networked OPC servers and they all report the same. The only thing that reports and data is the ACTUAL OPC Server under OPC Client Status.

If I go back to Labview 7.1 and open the tag monitor and monitor the exact same tags they update without a problem, so I know the OPC server is working.

I tried completeing the Knowledgebase that says to install opcenum service, but this did not change the results.

Any help would be greatly appreciated because I do not know where to go from here.

[.avi file]

Greetings!
    Thanks! I tried the same and got some shared variable configured as DAQ tasks to work well.
1) Please make sure you try restarting the variable engine
2) Make sure the shared variable engine is running
3) Delete all the existing process lists using the get process list and delete the process
4) Verify if the logos service are installed and tested correctly

Make sure that the network you are trying to connect has the firewall disabled just for the troubleshooting. Please also let me know if you are able to use the shared variable to write to any variable on the block diagram.

Thanks much and hope this helps
Avi Harjani

[mazz]

Thanks for your help. I got the below from NI tech support and it solved my problem:

I believe the problem may be solved by configuring the National Instruments

Variable Engine service.

This can be accessed from the Windows Control Panel >> Administrative Tools

>> Services >> National Instruments Variable Engine

1. Double click the National Instruments Variable Engine and this should

bring up the service configuration

2. Under the General Tab, click Stop to stop the service

3. Click on the Log on Tab and change the Log on as: from Local System

account to This account.

4. In This account, enter the domain name\username and your password

5. Click apply, then OK

6. Start the service and your tags should now read.