Dave --
You are using subarray which has been defined as part of MPI2 standard.
Current version of LAM does not have a full integration of ROMIO and its
MPI2 datatypes cannot be used with ROMIO. You will be able to find
documented under LAM user manual (section 5.2.6 and section 12.2)
Thanks,
Nihar
On Tue, 16 Mar 2004, David Cronk wrote:
>I am having some problems using Romio with LAM/MPI. In particular, with
>derived datatypes. Attached is a simple example program that does not
>work. This works fine with MPICH and Romio, but not LAM/MPI with Romio.
> I have tried with 2 different LAM-7.0.4 installations, installed by
>different people in different domains. These are both running on Linux
>Clusters using Redhat. I did not do either install so I don't have
>config output or anything like that.
>
>When I run my simple example I get the following error output:
>
>mpirun -np 2 a.out
>[0] About to set view
>Error: Unsupported datatype passed to ADIOI_Count_contiguous_blocks
>[1] About to set view
>Error: Unsupported datatype passed to ADIOI_Count_contiguous_blocks
>-----------------------------------------------------------------------------
>One of the processes started by mpirun has exited with a nonzero exit
>code. This typically indicates that the process finished in error.
>If your process did not finish in error, be sure to include a "return
>0" or "exit(0)" in your C code before exiting the application.
>
>PID 14977 failed on node n1 (160.36.140.86) with exit status 1.
>-----------------------------------------------------------------------------
>
>Note that I get a similar error when using some other (but not all)
>derived datatypes as well. As I said, this simple program works fine
>with MPICH. It also works fine on an Origin 3800 using the native MPI.
> This convinces me there is nothing wrong with the code.
>
>Has anyone experienced a similar situation? Any advice is greatly
>appreciated.
>
>Thanks,
>Dave Cronk.
>
>--
>Dr. David Cronk, Ph.D. phone: (865) 974-3735
>Research Leader fax: (865) 974-8296
>Innovative Computing Lab
>http://www.cs.utk.edu/~cronk
>University of Tennessee, Knoxville
>
Powered by LAM/MPI...
---------------------------------------
Nihar Sanghvi
LAM/MPI Team
Graduate Student (Indiana University)
http://www.lam-mpi.org
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