I have a VI that allows the user to select how many test they want to do, and each test has a set of 26 data point. I want to graph those data sets in series as Test 1, Test 2, et. depending on the number of test. I created a macro that graph all sets of data, and when I called it to graph less than all tests, it gives me an error because the macro cannot run due to insufficient data set. Any idea? Thanks.