To test whether the CSP structure generation had failed to locate the local energy minimum nearest to the observed crystal structure, we performed lattice energy minimization (using FIT multipoles) on the experimentally determined crystal structure after replacing the molecular geometry by the DFT gas phase optimized molecule. The obtained structure was virtually identical to the predicted structures obtained from CSP. This result confirmed that the structure found during CSP is the nearest local energy minimum to the observed crystal structure. The same test was performed with β-NTO, with the same result. For both molecules, further sampling during CSP structure generation would not find a better match to the observed crystal structure.