It looks like the isotropic setting can make vap files load incorrectly. I'm switching between cdf-polar-vis.vap and cdf-canopus-asi.vap.
To Demo:
1. load file:/L:/ct/autoplot/vap/cdf-canopus-asi.vap
2. load the file again: file:/L:/ct/autoplot/vap/cdf-canopus-asi.vap
Actually it looks like this vap demos some other bugs...
It looks like the vap file is correct.