2010-09-29 : Cleaned up error messages, now tries to output var/axis it was...

2010-09-29 : Cleaned up error messages, now tries to output var/axis it was working on as well as table used.
2010-09-29 : When value that exceeds valid_min/max is found, now returns location of extreme point instead of first point encountered, as well as actuall coordinates values (not just indices)