Memory error when using clmMonTLL?

The following block of code is throwing a malloc error:

all_files = systemfunc("ls "+dobs+"/*.nc | grep -v 'aggr_'")
fall = addfiles(all_files,"r")
print("All obs files read")
ListSetType(fall,"cat")
print("Obs files concatenated")
if (typeof(fall[0]->$var$).eq."double") then
    all_obs = dble2flt(fall[:]->$var$)
else
    all_obs = fall[:]->$var$
end if
printVarSummary(all_obs)
mon_avg_obs = clmMonTLL(all_obs)
print("mon_avg_obs created")
delete(all_obs)

Output:

 Copyright (C) 1995-2009 - All Rights Reserved
 University Corporation for Atmospheric Research
 NCAR Command Language Version 5.1.1
 The use of this software is governed by a License Agreement.
 See http://www.ncl.ucar.edu/ for more details.
(0) All obs files read
(0) Obs files concatenated

Variable: all_obs
Type: float
Total Size: 2094012000 bytes
            523503000 values
Number of Dimensions: 3
Dimensions and sizes: [time | 600] x [lat | 621] x [lon | 1405]
Coordinates:
            lat: [24.0625..49.9375]
            lon: [-125.0208..-66.4792]
Number Of Attributes: 1
  _FillValue : 1e+20

ncl(28773) malloc: *** mmap(size=2094014464) failed (error code=12)
*** error: can't allocate region
*** set a breakpoint in malloc_error_break to debug
fatal:NclMalloc Failed:[errno=12]

Any idea why clmMonTLL would cause this kind of error? Shouldn't it be
allocating a smaller array than the one it's reading in? I seem to be coming
up against this type of error a lot lately.

-Bridget

-- 
Bridget Thrasher, PhD
Postdoctoral Researcher
Climate Central
www.climatecentral.org

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Received on Mon Nov 2 12:47:09 2009