Not since LabVIEW 6. That was when that the option was added to make the conditional terminal stop if true or continue if true. You know have to wire a constant to the termianl in order to force it to run one time only. If you're using a book written for LabVIEW 5.x or earlier and have a much more recent version of LabVIEW, there's going to be a lot of things in the book that are obsolete and it won't cover a lot of new features.