[Wien] VLM's (very large matrices)

[Jorissen Kevin]

Dear WIEN users,
I'm using the wien code compiled with ifc7 and statically linked with mkl6, and I'm trying to push nmatmax as far as it will go.  I get crashes (for real system, ie lapw1) above about nmatmax = 12500 (nume is set to 2000 - okay, for systems with few electrons I could gain a little there), corresponding to about 1.7 GB of memory used.  At higher values, I get allocation errors, though there is about twice that amount of RAM available.
 
This appears to be a compiler limitation :  on http://support.intel.com/support/performancetools/fortran/linux/sb/CS-007795.htm we read that for IA32 the ifc does not allow arrays larger than 2 GB.
Documentation on the PGI website suggests the same thing will happen.
 
 
How do you work around this?
Thank you very much,
 
Kevin.