Dear Yong Hee Lee,

This message concerns a fix for the problem you reported with MM5V3.2
when running the MPP version on a Linux cluster. The problem was that
the MM5v3.2 code generated CFL errors unless the call to
RSL_SET_REGULAR_DECOMP in MPP/RSL/mpp_mm5_00.incl was commented out.
Further investigation revealed this was also a problem on the Fujitsu
VPP.

The problem was a bug in RSL. Your work-around fix of commenting out
RSL_SET_REGULAR_DECOMP in the MPP/RSL/mpp_mm5_00.incl file is fine, but
it turns off the output performance improvements in MM5v3r2.

If you wish to take advantage of the I/O performance improvements in
MM5V3R2 you can make the following repair to the version of RSL that is
distributed with MM5v3.2:

1. Edit the file MPP/RSL/RSL/rsl_io.c

 1.a At around line 636, modify the line to declare a new variable, 'dummy':

  int in_write, dummy ;

 1.b At around line 968, modify the line changing 'pbuf' to 'dummy':

  RSL_RECV( &dummy, msglen, mtag ) ;

2. In the directory MPP/RSL/RSL and type 'make linux'

3. Edit the file MPP/RSL/mpp_mm5_00.incl and uncomment the call
    to RSL_SET_REGULAR_DECOMP

4. In the Run directory, 'touch mm5.F'

5. In the top level directory, 'make mpp'

This should correct the problem you were seeing with CFL's on LINUX
with MM5v2r3. Please let me know how this works for you.

Thanks for reporting the problem; it turns out this was also a problem
on the Fujitsu VPP. This fix will be included in the next release (3.3)
of MM5 and RSL. This report will also be added to
http://www.mmm.ucar.edu/mm5/mpp/helpdesk.

Best regards,

John

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John Michalakes  | Argonne NL/MCS Div. | NCAR MMM Div.
michalak@ucar.edu                      | 3450 Mitchell Lane
http://www.mcs.anl.gov/~michalak       | Boulder, CO 80301
phone: 303-497-8199  fax: 303-497-8181
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