Hi Bastien. I run MIRA2 and the results look very good. I thing that I found some bugs or I doesn't understand MIRA2 files. 1) One cluster From my clusters: >lcl|reads_lrc19975 No definition line found TGTACAATCGSCYGGGGGAGAGTAAAAATACATGAGGTGATTTCAAGAGGATGGGTGCTATCAAGAGTAAAG TGCCATTG AGCATATTCAAGCATGTGTATTATGGCACCCTTTTTCTTTACCTGACTTCATTTCAGATACACAACCAAGAC AGCCATCA GAGGCATGTAAAGATGCTTTTGTAAACCCAGCATTACTGAGATACCGGGTCATGCTAATTTTTAC From file info/reads_info_consensustaglist.txt reads_lrc19975 10 10 10 10 IUPc Strain'default': S reads_lrc19975 12 12 12 12 IUPc Strain 'default': Y 12345678901234567890 TGTACAATCGSCYGGGGGAG It look like the location need to be 11 and 13. And not 10 12 (1 bp shift) 2) My fasta file has ~1M reads 454 est but the seq are in one line like this: >1 AGAGAGAGAGGGGGGGGGGGGAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAACCTTCTCTCTCTCTTC >2 ..... From file info/reads_info_readtaglist.txt ...... reads_lrc1 684 727 659 700 MRMr EHZ8CPV01CCJDE 52 95 ..... reads_lrc1 671 688 649 662 MRMr EHZ8CPV01A5HAK 115 132 ...... reads_lrc214 237 252 227 241 MRMr EPE3D2102GTQVD 282 297 ...... reads_lrc253 313 483 292 458 MRMr EPE3D2102G3MS6 181 351 ..... The number from reaTo from file reads_info_readtaglist.txt are more than the length of seq!!!! this are my est: >EHZ8CPV01CCJDE len=90bp AAGCAGTGGTATCAACGCAGAGTGCCCATTACAGCCGGGGGGAAGGAGCCCAGCATGAGAATCGATCGCCCT CGGCGTTCGAATTGTAGT >EHZ8CPV01A5HAK len=120bp AAGCAGTGGTATCAACGCAGAGTAGCCATTACGGCCGGGGTTTAGGCATATCAATAAGCGGAGGAAAAGAAA CTAACAAGGATTCCCCTA GTAACGGCGAGCGAACCGGGAAGAGCCCAG >EPE3D2102GTQVD len=290bp CGGCCTTTTTTTTTTTTTTTTTTTTTTCTTTTTTTTTTTTTTTTTTTTTTTTTTTCTTAGAGGCAAATTTTT TTTATTTA GCATTCTTAGTACAAGACACCATATAGGTGTAAGATTTGTATCAAGGCACTATAACAAGTTGTGGCACGTTA TCAACCAT ATTTATTTAGGATAGGATGACAGGGGACTTTCTTCTGATCCGGTGTCTGACAGCTGCTTCCCTTAAGCCTTT TATATCTT CACCTTTTCAGCAGTGGTCATGATCGCTCTCACTCTCGCTGCTGCTGCTG >EPE3D2102G3MS6 len=340bp CGGCCTTTTTTTTTTTTTTTGTTTTTTTTTTTTTTTTTTTTTTTTTNTTTTTTTTTTTTTTTTAAGGAAAAG CACGGTCA TACGCAAATGTAATGTCAAATTAGGCCGGCCACTATTACACAAACCCATTTACCCCAGGCAACATCATTGTC TTTGCCCT TTTGAATCCGACTAAAAAAGAACAAACTACGATCCTGCCTATATCATATCTGAAAAGTCCTAGAAGTCCAAC TTAACAAG CAAAGAACAAAAGAAACACCACCGAAACACCACCGCCAAGATTCAATTTCTTCCTCCCATTTCAGGAGAAAC AGCCTAGG CACGCTCGCCCCGGATTCCG Regards, Shai