I have come across a very strange situation. A commercial LV application and one that I have written use a com port; on about 10 machines running XP the software works well with available coms ports can be listed for selection. However, loading the same s/w, on a machine running Xp +sp3, no coms port are not available for selection. Yet other windows applications pick up the coms ports 1 & 2. Obviously there must be a problem between the labview application and windows,. Any suggestions to a solution would be greatly appreciated
