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Several Kinds of errors while executing a data acquisition application

Hi everybody!

I have made a data acquisition application which acquires data from four probes (Oxygen, Temperature, RedOx and pH) continuously. After a few hours or days suddenly NI Service Locator windows service stops, then my application crashes. Also I get other error messages for example, system error, etc... I can see them in events log from Windows OS. I attach here some screens. I use LV 7.0 Express with Measurement and Automation Explorer 3.0. Could be the problem caused by the version of drivers I use? I use MS Windows XP with SP2 and I don't use any firewall or antivirus because it isn't necessary in the plant, and the industrial computer doesn't have internet connection.

Many Thanks.
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