Hello Peter,
Thanks a lot. It worked well. However the run stopped after a few minutes. Here is the message :
Error aligning sequence. Error reading ebwt array: returned 113175904, length was 823263360
Your index files may be corrupt; please try re-building or re-downloading.
A complete index consists of 6 files: XYZ.1.ebwt, XYZ.2.ebwt, XYZ.3.ebwt,
XYZ.4.ebwt, X
Honestly I have no idea what it means. I tried to upload the fastq file from a big Cell paper to have an example of analysis. Do you think that the original Fastq from the paper could have a problem (as an example : an "home made" way to process samples ?)