ParameterNotSampled

exception ell1fit.eccentricity.ParameterNotSampled

A requested parameter is not among the columns of this chain.

Kept distinct from the other ValueError raised here, which means the table and the chain disagree about a parameter they both contain – that is a corrupted pairing of files and must never be silently skipped. “Not fitted” is a perfectly ordinary thing for a caller that asks for every orbital parameter and takes whichever were explored.