Thanks for looking into this. I appreciate it.
Some additional information. I did some more investigating, and it looks like sorts of arrays around 25,000 elements are not working either.
However, in trying to confirm this, I ran into another problem. The code I was using is below:
// Due to 12 digit keys, Int32 isn't big enough.
// Key1Numeric can be untyped, but then is difficult to examine
// in Visual Studio.
// Get alpha keys for 1st data, turn to numeric, sort.