If you haven't found this paper yet, it would be worth a read. Note that the examples attached should be in LabVIEW 7.1 or earlier, since the code was originally written in LabVIEW 6.0. In addition, you may want to check out this post, which deals with build array and concatentate strings memory problems. The code is posted as LabVIEW 2009 snippets, but you should be able to duplicate it with no issues in LabVIEW 7.1. The hidden case structure frames are just pass-throughs.
Large data applications in LabVIEW are often unique, so these papers can only give you hints. We would be able to help you a lot more if you would post your actual code and exactly what you are trying to do with it. For example:
"I am reading in a text file with four columns separated by tabs. The first column is a time stamp in HH:MM:SS format. The rest are signals in exponential format (e.g. 3.4E-1). I need to read the third column and plot it to the screen."
Good luck! Let us know if you need more assistance.
