campt reports PixelValue from the first band always

[afrigeri]

ISIS version(s) affected: 7.0.0

Description

campt reports PixelValue from the first band even when asking for band != 1

How to reproduce

download 10 by 10 pixel Chandrayaan-1 M3 sub-cube M3_10x10.cub.zip

unzip M3_10x10.cub.zip
campt from=M3_10x10.cub+1 sample=1 line=1  | grep PixelValue
PixelValue                 = -18.618536

campt from=M3_10x10.cub+25 sample=1 line=1  | grep PixelValue
PixelValue                 = -18.618536

should be: 16.72398

Possible Solution
explode-ing the cube then reassemble it, as a workaround.

Additional context

[AustinSanders]

I suspect that this is related to #5234. We're experiencing a bug in which cube attributes are not being identified, which would mean that the "+25" that is appended to the filename is being skipped, which could very well lead to the behavior you've described.

I'll do some testing and update this issue as I make progress.