[Beowulf] MPI & ScaLAPACK: error in MPI_Comm_size: Invalid communicator

Mark Hahn hahn at physics.mcmaster.ca
Tue Oct 19 15:33:22 EDT 2004


> MPI_Comm_size(82): MPI_Comm_size(comm=0x5b, size=0x80d807c) failed

I have no insight into any of this, except that these parameters 
are obviously reversed.  0x5b is a sensible size, and 0x80d807c
is not.  but 0x80d807c is a sensible pointer...

if this isn't a source-level transposition, perhaps it has to do 
with mixed calling conventions?


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