E-IG0004 — Missing placeholder schema

Error Type

Instance Generation Error

Phase

generating random instance data

Python exception

jijmodeling.CompileError

Message

Internal error: no schema found for placeholder `{name}` (declared as {spec}) while generating random instance data.

This is a bug in JijModeling - please report it to the developers in community Discord (https://discord.gg/Km5dKF9JjG) with the full error output.

Cause

Random instance generation needed to produce a value for a placeholder, but the instance-data schema used by the generator has no entry for it. When called through Problem.generate_random_dataset or Problem.generate_random_instance, the schema is built automatically from every placeholder registered on the problem, so the two should always agree.

Fix

This indicates a bug in JijModeling — please report it to the developers with the full error output.