memory allocation on linux

["Cannizzaro, Emanuele" <ecannizzaro@mtc.ricardo.com>]

I am writing to you regarding your experience to address a huge amount of 
memory on linux using the brk() function.

I am running a program called nastran (v2001) on a pc with redhat 7.2. This 
machine has got 2GB of disk spacebut  when I set the amount of memory to be 
used by nastran to a value bigger than 900 mb I get this fatal error message.

Process Id = 28179
idalloc: dynamic allocation failed - brk: Cannot allocate memory
   requested size: 402653184 words (1572864 kbytes)
   starting address:           0x0a300000 ( 170917888)
   maximum address requested:  0x6a300080 (1781530752)
 08:08:18  MAINAL: *** OPEN CORE MEMORY ALLOCATION FAILED *** ERROR =         
 1
 08:08:18  MAINAL: *** MEMORY REQUESTED =    402653184 ***
 08:08:18  MAINAL: *** PROCESSING TERMINATED ***
 08:08:18  Analysis complete  8
STOP OPEN CORE Allocation Failed statement executed

I have no access to the source code of the program and therefore I would need 
a patch to the memory allocation.

how can this problem be fixed?

Thanks in advance for your help

Emanuele Cannizzaro
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