The authors of the title paper (J. Cryst. Growth 393 (2014) 7-12) report to have grown a novel organic nonlinear optical (NLO) crystal namely N,N-dimethylurea picrate (NNDMP) by the slow evaporation technique using dimethylformamide (DMF) as solvent. Many points of criticism, concerning the characterization of this so called NNDMP crystal, are highlighted in this comment to prove that NNDMP is nor a novel NLO crystal. (C) 2014 Elsevier B.V. All rights reserved.