General Questions

NCAR IBM Related Questions

Terrain

Regrid

Datagrid

Rawins

MM5

Graph

Conventions used in MM5

Trouble shooting and clues on various computers

MM5 Model on SUN

Compiling MM5 on SUN

If you use default compiler options on a SUN from configure.user and MM5 stops with the following message:

    STOP: IN SUB. EXMOISS, NSTEP TOO LARGE, PROBABLY NAN

you may have a bugged Sun compiler (version 4.2). To get around this problem, you can do one of the following:

• compile everything with the default options. Then recompile subroutines addrx1c.F and addrx1n.F in memory/address replacing

  -fast

  with

  -fast -xtarget=generic

  (Fix provided by Dr. Harry Edmon of U. of Washington.)

• reduce optimization level from -O2 to -O1. This can result an increase in CPU time required to make a model run.

MM5 Pre-processing Programs on SUN

The new Fortran 90 programs, REGRID, INTERPF, and NESTDOWN require Sun's Fortran 90 compiler version 2.0 or higher. These program do not compile with versions lower than 2.0.