Hello Yurong, Thank you for contacting National Instruments.
There is no known CPU usage problem when updating from LabVIEW 6.02 to 7.0. Try reading the following knowledge base concerning CPU usage. http://digital.ni.com/public.nsf/websearch/8638139D6236D42086256A340073554A?OpenDocument If this does not solve your problem, try to isolate the portion of your code which is causing the 100% usage. Run your VI in highlight execution mode and monitor the CPU Usage. If you cannot isolate the problem, post your code and I will be glad to take a look at it. I hope this helps, Sean C. Applications Engineer National Instruments
