Hi guys,
I know it's been a while but I came across this post when I was researching the same issue for a customer.
If you are using a waveform chart in your application then that could be what's causing the issue. It's a known bug in 8 that's been fixed in 8.20. The suggested workaround is to save the VI without the graph, open it in 8.0 then rebuild the graph.
Hope this helps!
Sarah
Applications Engineer | National Instruments | UK & Ireland