It happens when you restrict the sample range to the point where
it's too small to compute the 0.05 and 0.95 quantiles. The columns
that usually show those values are dropped, but the associated
column headings are not dropped, as they should be. Should be easy
enough to fix.
Thank you Allin. This may be another occurrence but in my case there was no
restriction on the sample and all columns show up.
Good to know that fixing would be easy.
Best
Artur