Certain structures are very sensitive to the electrostatic model used for CSP. We have found that structures with high nitrogen content can be more sensitive to the electrostatic model than those without. Our initial CSPs on NTO, ATZ and TATB produced landscapes of varying quality using a typical electrostatic model; the RMSD 30 values (RMSD of atomic positions in a finite cluster of 30 molecules taken from the two crystal structures being compared) of the matches to the experimental structures covered a range from 0.186 Å to 1.004 Å. (W99rev), was also examined.