$ python3 n_point.py 7 points/n7_on_resonance.json
REFUSED (exit 3): integer kappa -1: on-resonance point (Gamma pole).  An integer cone exponent means a planar alpha'*s_I ON a string resonance: the amplitude has a Gamma-function pole there; no finite value exists to certify.  Evaluate at a nearby point.
# exit code 3
