Specify your hostfile as the default one:

mpirun --default-hostfile ./Cluster.hosts

Otherwise, we take the default hostfile and then apply the hostfile as a filter 
to select hosts from within it. Sounds strange, I suppose, but the idea is that 
the default hostfile can contain configuration info (#sockets, #cores/socket, 
etc.) that you might not want to have to put in every hostfile.


On Oct 27, 2010, at 7:51 AM, Stefan Kuhne wrote:

> Hello,
> 
> my Cluster has a configured default hostfile.
> 
> When i use another hostfile for one job i get:
> 
> cluster-admin@Head:~/Cluster/hello$ mpirun --hostfile ../Cluster.hosts
> ./hello
> --------------------------------------------------------------------------
> There are no allocated resources for the application
>  ./hello
> that match the requested mapping:
>  ../Cluster.hosts
> 
> Verify that you have mapped the allocated resources properly using the
> --host or --hostfile specification.
> 
> ...
> 
> Any ideas for it?
> 
> Regards,
> Stefan Kuhne
> 
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