FLX-5040: population declaration cannot be materialised
Family: numerics (the 5000 band)
A World or Persona declaration reached the sampler in a shape it cannot draw from: an unknown trait 'dist', a non-numeric weight or bound, a normal whose 'min' exceeds its 'max', or a market list the assignment cannot index. Fix the declaration; the engine will not substitute a default, because a substituted default would change the population digest without changing the documents.
Look it up offline
$ fluxsim explain FLX-5040
Every code is listed in the error index.