Hi, Here is the complete output of uname -a : Linux sandbox2 2.6.35-02063507-generic #201009290909 SMP Wed Sep 29 09:11:05 UTC 2010 x86_64 GNU/Linux Thanks, Sravya Tamma,Washington University Medical School,St Louis Mo, 63108, From: bach@xxxxxxxxxxxx Subject: [mira_talk] Re: Error: while assembling Illumina paired end reads Date: Tue, 19 Apr 2011 11:36:08 +0200 To: mira_talk@xxxxxxxxxxxxx On Apr 19, 2011, at 3:37 , Sravya Tamma wrote:b) which operating system (output of "uname -a") Linux sandbox2. I am not the root user and i do not have permission. This is not the complete output of "uname -a", is it? It misses some crucial information, could you please post the complete line? For installation i just downloaded the precompiled binary for linux (mira_3.2.1.13_dev_linux-gnu_i686_32_static.tar.bz2) , unpacked into my home directory: Hmmm ... that gives a hint of what could be the problem. Still, uname -a please :-) B.