Ensight reader does not support undefined and partial variables for ascii
The Ensight reader for ascii data will load numerical values for undefined and partial variables. This is annoying in that Paraview will calculate incorrect ranges. Instead, undefined and partial values should be NaN.
Here is a synthetic Ensight dataset that contains both undefined and partial variables:
ascii version: grid.tar.gz
This is a follow-up to this issue (Ensight reader does not support undefined and partial variables): #20747 (closed).