As mentioned previously, when a VI is "seriously!" broken, it does not run and a broken arrow is displayed. Since the error is immediately recognized by LabVIEW, usually in such particular cases, the fix is probably simple (unless a major design error is recognized). A more difficult situation maybe where there are no obvious errors, but the VI does not do what we intend it to do. We will now take a closer look at a version of a VI we used in Chapter 4, DAQ Programming Using LabVIEW:
When we run the preceding VI several times, we will notice a couple of issues with the VI. Note that a displayed array may be extended horizontally or vertically:
The array gets longer and longer and new values are appended to the end of the results from the previous run
There are blank array elements between the array entries (this was an error with the logic of the VI and we fixed it by adding a check for blank array elements)
To fix the issue, we know that we need to initialize the...
