If you are not using NI OPC Servers, then this setting does not affect you. I wanted to point this out for anyone who sees this behavior with NI OPC Servers and for you in case your server has a similar setting. Without this setting, when I tried to bind a shared variable to an OPC server tag, I could not see the OPC tags when browsing. If I typed the path to the tag, then I had trouble getting data back from the shared variable unless Variable Manager or DSM (Distributed System Manager) was running. Running the server as a service forced the connections to stay open in this case.
The fact that Daylight Savings Time change broke your software is concerning. Other ideas would be to try LV 8.6 as there were shared variable ugrades between 8.5 and 8.6. If you use LV 8.6.1 make sure you get the deployment patch (nitaglv.dll replacement); otherwise, your target IP addresses all become "localhost" when deployed into the Variable Engine (as Hillman pointed out in another post). Download the DLL here:
http://joule.ni.com/nidu/cds/view/p/lang/en/id/1255
Make sure you replace the DLL in both of these places to cover development and Run-Time:
C:\Program Files\National Instruments\LabVIEW 8.6\resource
C:\Program Files\National Instruments\Shared\LabVIEW Run-Time\8.6
For debug, try opening DSM and then try to bind the shared variable. You can also try to set the binding for the deployed variable directly in DSM (right click and "Edit Variable").
