<HTML>
<HEAD>
<TITLE>FW: DRAFT WRF 3.2.1 Bug Report</TITLE>
</HEAD>
<BODY>
<FONT FACE="Lucida Grande"><SPAN STYLE='font-size:11pt'><BR>
Dear wrfhelp:<BR>
<BR>
I am experiencing problems running WRF3.2.1 on a case that works with WRF3.1.1. Two grids are used:<BR>
<BR>
max_dom = 2,<BR>
s_we = 1, 1, 1,<BR>
e_we = 1200, 393, 400,<BR>
s_sn = 1, 1, 1,<BR>
e_sn = 800, 385, 400,<BR>
s_vert = 1, 1, 1,<BR>
e_vert = 35, 35, 35,<BR>
num_metgrid_levels = 40<BR>
dx = 4000, 2000, 1000,<BR>
dy = 4000, 2000, 1000,<BR>
<BR>
And the initial and lateral boundary conditions are provided by the NAM (00Z 10 April 2009 – 12Z 11 April 2009).<BR>
<BR>
The WRF 3.1.1 runs this case without incident. However, the WRF3.2.1 will either fail with this message:<BR>
<BR>
FATAL CALLED FROM FILE: <stdin> LINE: 15172<BR>
-------------- FATAL CALLED ---------------<BR>
frame/module_domain.f: Failed to allocate grid%smois(sm31:em31,1:model_config_r<BR>
ec%num_soil_layers,sm33:em33). <BR>
<BR>
Or else 3.2.1 will *usually* run with random and immediate CFL errors if “too many” MPI processes are used (above 40). In a handful of cases, however, the same executable will run without issue.<BR>
<BR>
I’ve noticed that the 3.2.1 real.exe executable also experiences the memory allocation error. Also, these problems occur regardless of whether WPS 3.1.1 or 3.2.1 is used to process the NAM data.<BR>
<BR>
I’m running on a Linux distributed cluster, using 40 nodes with 2 dual-core Intel Woodcrest chips with 4 GB RAM per node. The WRF is compiled with ifort 11.1.038 and Intel MPI 3.2.011. I’ve experimented with other MPI implementations (Intel MPI 4.0.0.025 and MVAPICH2-1.4.1) and I see the same behavior.<BR>
<BR>
I have sample namelist.input, wrfinput and wrfbdy files available for upload.<BR>
<BR>
Thanks,<BR>
<BR>
-Eric<BR>
<BR>
<BR>
</SPAN></FONT><SPAN STYLE='font-size:11pt'><FONT FACE="Courier, Courier New">--------------------------------------------------------------------<BR>
Eric M. Kemp Northrop Grumman Corporation<BR>
Meteorologist Information Systems<BR>
Civil Enterprise Solutions Civil Systems Division<BR>
<BR>
Goddard Space Flight Center<BR>
Mailstop 610.3<BR>
Greenbelt, MD 20771<BR>
Telephone 301-286-9768<BR>
Fax 301-286-1775<BR>
E-mail: <a href="eric.kemp@nasa.gov">eric.kemp@nasa.gov</a><BR>
E-mail: <a href="eric.kemp@ngc.com">eric.kemp@ngc.com</a><BR>
--------------------------------------------------------------------<BR>
<BR>
</FONT><FONT FACE="Lucida Grande"><BR>
<BR>
------ End of Forwarded Message<BR>
</FONT></SPAN>
</BODY>
</HTML>