Write to Spreadsheet File writes only NULL characters

[quynhon89]

@J.Busby  did you ever figure out the reason of the problem? I'd like to see this topic ends up in a better way than this bcuz I'm having similar problem here. Would appriciate any helpful input.

[J.Busby]

Did I ever get to the exact cause of the problem? No. The NI ticket that I created only provided a small nugget of information:

"However, there are known problems with running an application for prolonged periods of time, especially if it’s on a nondeterministic OS, such as Windows."

I ran multiple tests involving extended periods of reading/writing data and was never able to reproduce the issue.

I did end up migrating from LabVIEW 2012 SP1 to LabVIEW 2014 about 6 months after I created this thread. We're still using the same exact code for writing data outputs to this day and have not had any other issues like we had. We ended up making it standard practice to close and restart the software after it had sat for days just to be on the safe side but even if we forgot, we never saw this issue again.