I'm not sure if anyone out there is familiar with PI-Processbook, or PI-Datalink, or PI-Batchview... But here's my prob. I've created an excel app that uses PI-Datalink and PI-Batchview to capture data. From there, I do calculations on the data. I also have an automatic refresh built in through the Application.Ontime event (refreshes sheet range every five secs). When I look at how much memory my excel app is using through task manager (this app will run in xl97 & 2000, on win NT & 2000) it's using up to 18 or 19 mg of memory. Upon startup, it's using 12 or 13 mg. Is this ordinary, I don't think it is??? Please help....