I guess some non-allowed characters are present in the read names. Just to check: can you send me the first 100 lines of the FASTA (or FASTQ) file you used to assemble. Furthermore, the first 1000 lines of the CAF file in question? Thanks, B. ----- original message -------- Subject: [mira_talk] gap2caf Sent: Fri, 12 Nov 2010 From: Brian Forde Hello all, I have edited a mira assembly in Gap and used gap2caf to convert back to a caf file. As per the mira manual I then used convert_project to convert a caf to maf with the -r switch to recalculate the consensus. However, i get the following error [0%] Read HWI-EAS210R_0001:5:103:1403:1164#GCCAAT/ already loaded before! Fatal Error (may be due to problems of the input data):"Duplicate readname in CAF file: HWI-EAS210R_0001:5:103:1403:1164#GCCAAT/" ->Thrown: Read & CAF::createCafRead() ->Caught: Error while creating CAF-Object. Is there a simple fix for this problem? regards Brian --- original message end ----