On May 10, 2013, at 18:35 , Felipe Gajardo <felipe.gajardo.e@xxxxxxxxx> wrote: > > Does know MIRA that some reads are mate-paired if not having the traceinfo > > file? > Yes, traceinfo file is not used for that. Read-naming is important. > But how knows MIRA the span between the mate reads? or the span is not > essential for the assembly process? Ah, this you did not ask :-) For that the traceinfo is indeed needed. But as John said: you can just take a subset of reads but still load the whole traceinfo file … I've been in the very same situation often enough in the past few years for having MIRA handle this gracefully. And I would like to nudge you once again towards the 3.9.x versions of MIRA where the necessity for traceinfo files has disappeared completely. B.