Thanks for the details Mark.
I will turn off the metrics, but the specific error was insufficient memory to layout the chart.
I will take you suggestion about singletons and duplicate edges, but for a quick analysis, I might be better to reduce the number of records involved, especially because I can’t upgrade the memory of my laptop. I was surprised that NodeXL would not cache it, or is that an excel thing. Maybe I reached a limit there too.
I opted for Cluster grouping to simplify the chart. Once I get to that point, I might give some feedback about small improvements with the interface.
I’m still exploring NodeXL to analyse my data, but in the short term I have had to resort to manually examining it for key connections. Once connections are found, of course I have to go elsewhere to see what they mean.