This file should be deleted before copying the unittestpio directory onto the trunk.

Issues to deal with:

1) First example of pio_initdecomp from webpage is not supported.
   pio_initdecomp(iosystem,PIO_int,dims,start,count,iodesc)

"pio_support::pio_die:: myrank=          -1 : ERROR: piolib_mod.f90:         441 : subroutine not yet implemented"

2) Can not open a binary file with PIO_write and put data in it.

"write_mpiio_int: after call to file_write_all:MPI_ERR_READ_ONLY: file is read only
pio_support::pio_die:: myrank=          -1 : ERROR: iompi_mod.F90:         230 : (no message)"

3) When "creating" a binary file that already exists with PIO_CLOBBER
   (which is ignored), file is not emptied.

"warning, the mode argument is currently ignored for binary file operations"

4) When creating a binary file to write data using PIO_iotype_direct_pbinary,
   file is 32767 times larger than same file written with PIO_iotype_pbinary

   Note: this is on my laptop... on Frankfurt and Yellowstone, using
   PIO_iotype_direct_pbinary leads to MPI crashing:

Frankfurt
---------
"write_mpiio_int after call to file_set_view:MPI_ERR_ARG: invalid argument of so
 me other kind
 pio_support::pio_die:: myrank=          -1 : ERROR: iompi_mod.F90:         223 
 : (no message)"

Yellowstone
-----------
"write_mpiio_int after call to file_set_view:Invalid argument, error stack:
MPI_
 FILE_SET_VIEW(57): Invalid displacement argument
 pio_support::pio_die:: myrank=          -1 : ERROR: iompi_mod.F90:         223 
 : (no message)"

5) For tests where we expect failure (e.g. writing a file that was opened nowrite)
   I am just checking for ret_val.ne.0 - should I compare to an exact error val?

6) PIO_openfile hangs in netcdf input / output tests when stride < ntasks:
   stride = 1 with 2 tasks on my laptop
   stride = 2 with 4 tasks on frankfurt
   stride = 4 with 8 tasks on caldera

   (all 3 cases run fine with stride = ntasks)


FIXED
-----

** Can not suppress MPI-IO warning message if file does not exist.

"open_mpiio: after call to MPI_file_open:MPI_ERR_NO_SUCH_FILE: no such file or directory"

Solution: added CheckMPI optional flag to iompio_mod.F90.in::PIO_openfile and piolib_mod.F90::PIO_openfile

** Test netcdf file (3*ntasks integers) is always 4096 bytes, while pnetcdf
   file is (80 + 12*ntasks) bytes

Solution: not actually a problem