Hello All, My parameters are: mira --project=reads --job=denovo,genome,accurate,454 454_SETTINGS -LR:mxti=yes -AS:mrpc=1 -OUT:stsip=yes:sssip=yes COMMON_SETTINGS -SK:mnr=yes:nrr=10 -highlyrepetitive -CO:asir=yes After taking singlets into account, I am still getting one fourth of my sequences in debris. I couldn't figure this out as quality scores for those sequences are good and read length as well. Can anyone help me here? Please someone suggest me what to do to avoid getting too many sequences in debris or help me understanding debris file in detail. Many thanks, Jyo