That was a good suggestion, thank you.  It did not occur to me that Adaptive wouldn't work the way it purports to (i.e., it doesn't adapt when you run in a separate proc - nothing in the manual leads one to suspect this). This completed in something like 2.5 hours, whereas previous attempts would choke and bog down at a small fraction of the way through.  I don't think I'll be junking Vue 6i just the same, but thanks to those who suggested this setting. souvenir attached, originally 16x8 reduced to 800x600

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