Running 3dvar; not enough memory

Accelerated Computing HPC Compilers Legacy PGI Compilers
1

hey everyone,
I am trying to assimilate 2 wrfout files the parent and the nested one

  1. when I assimilate the outer domain (Parent) that has 25mb everything
    seems to be ok and it’s producing the output files as well, but when I am
    trying to assimilate the the inner (nested) domain (107mb) is where the problem
    starts … as it gives me the following error

0: ALLOCATE: 15795584 bytes requested; not enough memory

and if i use unlimit option here is what I get

WRFVAR V2.1.0.0 MODEL
DYNAMICS OPTION: Eulerian Mass Coordinate
-------------- FATAL CALLED ---------------
frame/module_domain.f: Failed to allocate
grid%xp%v2y(sm31y:em31y,sm32y:em32y,sm33y:em33y).

wrf_abort

My model settings are:
bigger domain 142112 res. 30km file size 25mb (this works fine)
Nested domain 283238 res. 10km file size 107mb ( problems above mentioned)
PC - FC 9 Linux
Intel Duo core 8Gb memory
Compilers PGI (pgf90)

Any Idea on how to solve this will be appreciated.

Thank you in Advance