# lw_mean_mol_len 40000 < alarm The length-weighted mean molecule length is {} bases. Ideally, we expect a number around 100 kb or larger. Short molecules will likely reduce the scaffold and phase block N50 length, and could result in misassemblies. # num_lines 1 < exit The assembly graph does not contain any structure that could represent genomic regions longer than 10 kb and Supernova will not continue. This is a signal of a serious problem with the input data.