Hii I have downloaded an Illumina Pair-end data set from SRA and used fastq-dump from SRA tool-kit to generate the fastq file for that..well everything works fine till here..now i wanted to reassemble it with MIRA..but from SRA i got only one file for pair end reads, as they mentioned that it will be a joined (may be by cat ???) file...now i am not sure how to a single file for a PE assembly with MIRA..somewhere i found that they mention it to treat it as a unpaired one but then should i use readgroup = unpaired/PE... in both cases MIRA is complaining...little confuse..any one has any experiences with this??? thanks for any help best ... -- *CHAYAN ROY*