Use a very small sample of your data that reproduces the problem in place of the data I gave. Show us what you see printed and what you expect to be printed. File size is not the issue.

We need to see the code that you are using that fails and the data that it fails with. If you can't reduce the pertinent code to a size similar to my sample and the pertinent data to a similar size, you do not understand your own code and data and have not identified the actual problem.