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  • Issue with BLAST database path!

    Hi all,

    I downloaded BLAST+ together with the env_nt pre-formatted database. All database files are under ../ncbi-blast-2.3.0+/db/env folder including the env_nt.nal folder.

    Following compilation instructions online I also set the PATH for both the Blast executable:

    gullived@PN0000044567:~$ export PATH=/home/gullived/ncbi-blast-2.3.0+/bin

    and the Blast database:

    gullived@PN0000044567:~$ export BLASTDB=/home/gullived/ncbi-blast-2.3.0+/db/env

    However when I try to run a blast command blast does not find the database and I get an error like this:

    blastn -query '/home/gullived/Daniel_Data/MEtabat folders/documents-export-2016-05-10/July_5000_Hala_superspecific.1.fa' -db env
    BLAST Database error: No alias or index file found for nucleotide database [env] in search path [/home/gullived:/home/gullived/ncbi-blast-2.3.0+/db/env::]

    It seems to add the path to the directory I call Blast from to the database path and a few additional colons. I tried to overcome this issue by adding a .ncbirc file and specifying the path to the database in that file, however that only made it worse and the error looked like this:

    BLAST Database error: No alias or index file found for nucleotide database [env] in search path [/home/gullived:”/home/gullived/ncbi-blast-2.3.0+/db”:/home/gullived/ncbi-blast-2.3.0+/db/env:]

    How can I tell the blast executable to only look for the database under the PATH I specify when setting the database path? and not add anything else to it?

    Any help is appreciated!

    Thank you!

  • #2
    Can you post a listing of

    Code:
    $ ls -lh /home/gullived/ncbi-blast-2.3.0+/db/env

    Comment


    • #3
      gullived@PN0000044567:~$ ls -lh /home/gullived/ncbi-blast-2.3.0+/db/env
      Command 'ls' is available in '/bin/ls'
      The command could not be located because '/bin' is not included in the PATH environment variable.
      ls: command not found
      gullived@PN0000044567:~$

      This is what I get when I call the above line.

      Thanks,

      Daniel

      Comment


      • #4
        Looks like you messed up your default $PATH when you tried to change it. That should be fixable by a reboot. In mean time try /bin/ls and the rest of the command above and post the results.

        Comment


        • #5
          Do you mean adding /bin/ls to the path?

          gullived@PN0000044567:~$ ls -lh bin/ls/home/gullived/ncbi-blast-2.3.0+/db/env
          Command 'ls' is available in '/bin/ls'
          The command could not be located because '/bin' is not included in the PATH environment variable.
          ls: command not found

          Comment


          • #6
            Try this.

            Code:
            $ /bin/ls -lh /home/gullived/ncbi-blast-2.3.0+/db/env
            There should be 240 files for env_nt.NN.n**. You don't need to post the entire output, if you see a lot of files.
            Last edited by GenoMax; 05-10-2016, 09:56 AM.

            Comment


            • #7
              Restarted my computer:

              Yes, there are a lot of files:

              gullived@PN0000044567:~$ /bin/ls -lh /home/gullived/ncbi-blast-2.3.0+/db/env
              total 43G
              -rw-r--r-- 1 gullived gullived 56M Nov 18 2012 env_nt.00.nhd
              -rw-r--r-- 1 gullived gullived 1.3M Nov 18 2012 env_nt.00.nhi
              -rw-rw-r-- 1 gullived gullived 416M Nov 18 2012 env_nt.00.nhr
              -rw-rw-r-- 1 gullived gullived 37M Nov 18 2012 env_nt.00.nin
              -rw-rw-r-- 1 gullived gullived 25M Nov 18 2012 env_nt.00.nnd
              -rw-rw-r-- 1 gullived gullived 97K Nov 18 2012 env_nt.00.nni
              -rw-r--r-- 1 gullived gullived 13M Nov 18 2012 env_nt.00.nog
              -rw-rw-r-- 1 gullived gullived 137M Nov 18 2012 env_nt.00.nsd
              -rw-rw-r-- 1 gullived gullived 2.8M Nov 18 2012 env_nt.00.nsi
              -rw-rw-r-- 1 gullived gullived 745M Nov 18 2012 env_nt.00.nsq
              .....
              -rw-r--r-- 1 gullived gullived 954M Apr 19 14:04 env_nt.22.nsq
              -rw-r--r-- 1 gullived gullived 378K May 2 13:54 env_nt.23.nhd
              -rw-r--r-- 1 gullived gullived 8.9K May 2 13:54 env_nt.23.nhi
              -rw-r--r-- 1 gullived gullived 3.4M May 2 13:54 env_nt.23.nhr
              -rw-r--r-- 1 gullived gullived 279K May 2 13:54 env_nt.23.nin
              -rw-r--r-- 1 gullived gullived 186K May 2 13:54 env_nt.23.nnd
              -rw-r--r-- 1 gullived gullived 788 May 2 13:54 env_nt.23.nni
              -rw-r--r-- 1 gullived gullived 93K May 2 13:54 env_nt.23.nog
              -rw-r--r-- 1 gullived gullived 906K May 2 13:54 env_nt.23.nsd
              -rw-r--r-- 1 gullived gullived 20K May 2 13:54 env_nt.23.nsi
              -rw-r--r-- 1 gullived gullived 27M May 2 13:54 env_nt.23.nsq
              -rw-r--r-- 1 gullived gullived 402 May 4 12:37 env_nt.nal
              gullived@PN0000044567:~$

              Comment


              • #8
                Great. Use the following. I suggest that you remove (and not use) any spaces in the file/dir names.


                Code:
                $ blastn -query '/home/gullived/Daniel_Data/MEtabat folders/documents-export-2016-05-10/July_5000_Hala_superspecific.1.fa' -db env_nt
                if full path is required then
                Code:
                blastn -query '/home/gullived/Daniel_Data/MEtabat folders/documents-export-2016-05-10/July_5000_Hala_superspecific.1.fa' -db /home/gullived/ncbi-blast-2.3.0+/db/env/env_nt

                Comment

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