I am using LabView 6.0 with Windows98. When I insert a Visa device name constant, the computer gets terribly slow, accessing it's harddisk (it looks like it's trying to refresh constantly). Moving the Visa device name constant so that it doesn't show on the screen (or placing a window in front of it), or hiding the diagram altogether, takes care of the problem. What causes this and is there any other way to prevent this from happening?