Hi Raymond, That is just a performance warning, but has absolutely no correctness implications. That comes from the tradeoff of performance vs. space. Sometimes we choose to pack a structure in spite of memory usage rather than optimizing access time to all of its fields, as we may consider that being of more interest. I hope this answers your question. Best, Antonio On 02/25/2014 04:48 AM, Raymond D Wright wrote:

Hello,

If I could ask a beginners question - I get this warning in "m.txt" at the end of doing "make":

sed -e 's/^C/\!/g' -e '/EXTERNAL/d' \ -e '/REAL\*8/d' \ -e '/DOUBLE PRECISION/d' \ -e '/MPI_WTICK/d' src/binding/f77/mpif.h > src/binding/f90/mpifnoext.h MOD src/binding/f90/mpi_constants.mod-stamp src/binding/f90/mpi_constants.f90(7): warning #6379: The structure contains one or more misaligned fields. [MPI_STATUS] TYPE :: MPI_Status ----------------^

Is it likely to cause trouble when I start using mpich?

(I need it for "hdf5","netcdf","io/api" as infrastructure to "models-3/cmaq")

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-- Antonio J. Pe�a Postdoctoral Appointee Mathematics and Computer Science Division Argonne National Laboratory 9700 South Cass Avenue, Bldg. 240, Of. 3148 Argonne, IL 60439-4847 [email protected] www.mcs.anl.gov/~apenya