I get errors of the following type using Mira 3.0.2: Error: read name FQIBXOY01A4H2K present multiple times in readpool! Which is funny since there is only ONE sequence in the input with that name. I don't know why Mira considers non-unique names a problem unless these are used as hash keys?. In that case Mira's should perhaps assign a forth running ID number to reads, do the assemble magic, and upon finishing the output substitute the IDs with the original sequence names? Martin