[rDock-list-def] error with a parallel rDocking on a computer with 4 CPUs without job scheduler

[Jose M. G. <jos...@un...>]

Dear rDock communauty,

I noticed a strange behavior of rDock recently. Here is the short story...

I tried to dock a database on multiple CPUs without using a job 
scheduler, as none was already installed on this particular computer and 
I needed to start the docking quickly for the weekend...

To do so, I followed this tutorial (1). I have 4 CPUs on my computer, so 
I splitted the input ligands file in 4 even parts and I 'submitted' 4 
jobs using the following syntax in a bash script (snippet at reference 2).
When I checked, all jobs were running simultaneously, as I wished.
However, I noticed a very strange behavior when I came back this 
morning. No job finished but all stopped without printing any error 
message at very different times (3). Here is an example of the relevant 
part of one of the log files : (4).

Did anyone try the tutorial (1) and noticed the same behavior? Do you 
have insight about what could have caused it?
Could this be resolved by a job scheduler, such as PBS or Condor?

Thank you for your help!!!

Jose Manuel

Additional Informations :
OS: Centos 6.5
CPUs type :  Intel(R) Core(TM) i7 CPU 950 @ 3.07GH

REFERENCES :
(1) http://rdock.sourceforge.net/how-to-run-rdock-in-parallel/

(2)
#/bin/bash

for file in *sd; do
     out=$(echo $file | cut -d. -f1)'_out'
     rbdock -i $file -o $out -r $protein.prm -p dock.prm -n 20  > 
$out.log 2>&1 &
done

(3)
job1 - Nov 23 11:22
job2 - Nov 20 16:06
job3 - Nov 21 00:29
job4 - Nov 21 10:09

(4)
**************************************************
RECORD #4577
NAME:   previousLigand
RANDOM_NUMBER_SEED:           1164231034

**************************************************
RECORD #4578