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mpirun problem



Hello,
I have a laptop with a 4 core CPU (CPU0, CPU1, CPU2, CPU3), running 
unstable/amd64. I want to run an executable in parallel, on all 4 cores in my 
machine. When I type

mpirun -np 4 executable_name

I get the message:

ssh: connect to host my_machine_name port 22: Connection refused                             
--------------------------------------------------------------------------            
A daemon (pid 23383) died unexpectedly with status 255 while attempting               
to launch so we are aborting.                                                         

There may be more information reported by the environment (see above).

This may be because the daemon was unable to find all the needed shared
libraries on the remote node. You may set your LD_LIBRARY_PATH to have the
location of the shared libraries on the remote nodes and this will
automatically be forwarded to the remote nodes.
--------------------------------------------------------------------------
--------------------------------------------------------------------------
mpirun noticed that the job aborted, but has no info as to the process
that caused that situation.
--------------------------------------------------------------------------
mpirun: clean termination accomplished

Any suggestion?
Dimitris


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