Date: Tue, 6 Aug 2002 09:40:33 -0700
From: "David A. Case"
Subject: Re: "number of processors must be a power of two"

On Tue, Aug 06, 2002, Jim wrote:
>
> number of processors must be a power of 2, and no greater than 128:

This is a message generated by sander; with the (default) BTREE option in
version 7, the number of processors indeed must be a power of 2. It has
nothing to do with your MPI implementation.

You can remove this restriction by adding "-DnoBTREE" to your MACHINEFLAGS
variable (in the MACHINE file) and re-compiling. This change might not
even cost much in performance if your MPI has a good implementation of global
gather/scatters (MPICH does not have very efficient implementations here.)

..hope this helps...dac