Hi, I installed bowtie2 and when running tophat I get the following error: Error in tophat: [2012-06-19 14:02:39] Beginning TopHat run (v2.0.3) ----------------------------------------------- [2012-06-19 14:02:39] Checking for Bowtie Bowtie version: 2.0.0.6 [2012-06-19 14:02:39] Checking for Samtools Samtools version: 0.1.18.0 [2012-06-19 14:02:39] Checking for Bowtie index files Error: Could not find Bowtie 2 index files (/tmp/tmpojo7bV/AgamP3.14.dna.toplevel.*.bt2) I was wondering if I can create the index files using bowtie2 via command line and then change the universe_wsgi.ini to: # Temporary files are stored in this directory. new_file_path = database/tmp and put the index files there. Anyway, why is it not creating the indexes? I created links to all bowtie2 executable files. If I remove bowtie 0.12.8, then I get a error from tophat (bowtie not installed). Is it creating the index with bowtie 0.12.8? Thank you. Luciano