nauty-genbg has inherent limitation for the ranges of partite set sizes, and produces an error if they are out of these ranges - like:

$ nauty-genbg 5 28
>E genbg: must have n1=1..24, n1+n2=1..32

I believe this is a major but poorly documented limitation. It'd be nice if the recently added interface (ticket #33365) take a special care of it and communicated such an error (if it appears) clearly to the user.

I'm not sure if the interface should really check any ranges itself as the allowed range may potentially change in future versions of nauty-genbg.

Component: graph theory

Author: David Coudert

Branch/Commit: 1733d84

Reviewer: Frédéric Chapoton

Issue created by migration from https://trac.sagemath.org/ticket/34179